Figured out most of the battle action packets; 0x139, 0x13a, 0x13b.

FFXIVClassic Map Server/FFXIVClassic Map Server.csproj

@@ -124,6 +124,8 @@
     <Compile Include="packets\send\actor\ActorDoEmotePacket.cs" />
     <Compile Include="packets\send\actor\ActorInstantiatePacket.cs" />
     <Compile Include="packets\send\actor\BattleAction1Packet.cs" />
+    <Compile Include="packets\send\actor\battle\BattleAction.cs" />
+    <Compile Include="packets\send\actor\battle\DoBattleActionX10Packet.cs" />
     <Compile Include="packets\send\actor\DeleteAllActorsPacket.cs" />
     <Compile Include="packets\send\actor\events\SetEventStatus.cs" />
     <Compile Include="packets\send\actor\events\SetNoticeEventCondition.cs" />
@@ -134,7 +136,7 @@
     <Compile Include="packets\send\actor\events\SetPushEventConditionWithCircle.cs" />
     <Compile Include="packets\send\actor\_0x132Packet.cs" />
     <Compile Include="packets\send\actor\SetActorIsZoningPacket.cs" />
-    <Compile Include="packets\send\actor\DoBattleActionPacket.cs" />
+    <Compile Include="packets\send\actor\battle\DoBattleActionSinglePacket.cs" />
     <Compile Include="packets\send\actor\inventory\EquipmentChangePacket.cs" />
     <Compile Include="packets\send\actor\inventory\InventoryBeginChangePacket.cs" />
     <Compile Include="packets\send\actor\inventory\InventoryEndChangePacket.cs" />

FFXIVClassic Map Server/packets/send/Actor/battle/BattleAction.cs

@@ -0,0 +1,18 @@
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+
+namespace FFXIVClassic_Map_Server.packets.send.actor.battle
+{
+    class BattleAction
+    {
+        public uint targetId;
+        public ushort amount;
+        public ushort worldMasterTextId;
+        public uint effectId;
+        public byte param;
+        public byte unknown;
+    }
+}

FFXIVClassic Map Server/packets/send/Actor/battle/BattleActionX01Packet.cs

@@ -6,14 +6,14 @@ using System.Linq;
 using System.Text;
 using System.Threading.Tasks;
 
-namespace FFXIVClassic_Map_Server.packets.send.actor
+namespace FFXIVClassic_Map_Server.packets.send.actor.battle
 {
-    class DoBattleActionPacket
+    class BattleActionX01Packet
     {
         public const ushort OPCODE = 0x0139;
         public const uint PACKET_SIZE = 0x58;
 
-        public static SubPacket buildPacket(uint playerActorID, uint sourceActorId, uint targetActorId, uint animationId, uint effectId, ushort worldMasterTextId, ushort commandId, ushort amount, byte dirOrBody)
+        public static SubPacket buildPacket(uint playerActorID, uint sourceActorId, uint targetActorId, uint animationId, uint effectId, ushort worldMasterTextId, ushort commandId, ushort amount, byte param)
         {
             byte[] data = new byte[PACKET_SIZE - 0x20];
 
@@ -27,8 +27,7 @@ namespace FFXIVClassic_Map_Server.packets.send.actor
                     //Missing... last value is float, string in here as well?
 
                     binWriter.Seek(0x20, SeekOrigin.Begin);
-                    binWriter.Write((UInt16)1); //? Crashes if changed
+                    binWriter.Write((UInt32)1); //Num actions (always 1 for this)
-                    binWriter.Write((UInt16)0); //?
                     binWriter.Write((UInt16)commandId);
                     binWriter.Write((UInt16)810); //?
 
@@ -39,7 +38,7 @@ namespace FFXIVClassic_Map_Server.packets.send.actor
 
                     binWriter.Write((UInt32)effectId);
 
-                    binWriter.Write((Byte)dirOrBody);
+                    binWriter.Write((Byte)param);
                     binWriter.Write((Byte)1); //?
                 }
             }

FFXIVClassic Map Server/packets/send/Actor/battle/BattleActionX10Packet.cs

@@ -0,0 +1,63 @@
+using FFXIVClassic_Lobby_Server.packets;
+using FFXIVClassic_Map_Server.packets.send.actor.battle;
+using System;
+using System.Collections.Generic;
+using System.IO;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+
+namespace FFXIVClassic_Map_Server.packets.send.actor.battle
+{
+    class BattleActionX10Packet
+    {
+        public const ushort OPCODE = 0x013A;
+        public const uint PACKET_SIZE = 0xD8;
+
+        public static SubPacket buildPacket(uint playerActorID, uint sourceActorId, uint animationId, ushort commandId, BattleAction[] actionList)
+        {
+            byte[] data = new byte[PACKET_SIZE - 0x20];
+
+            using (MemoryStream mem = new MemoryStream(data))
+            {
+                using (BinaryWriter binWriter = new BinaryWriter(mem))
+                {
+                    binWriter.Write((UInt32)sourceActorId);
+                    binWriter.Write((UInt32)animationId);
+
+                    //Missing... last value is float, string in here as well?
+                    
+                    binWriter.Write((UInt32) actionList.Length); //Num actions (always 1 for this)
+                    binWriter.Write((UInt16)commandId);
+                    binWriter.Write((UInt16)810); //?
+
+                    binWriter.Seek(0x20, SeekOrigin.Begin);
+                    foreach (BattleAction action in actionList)
+                        binWriter.Write((UInt32)action.targetId);
+
+                    binWriter.Seek(0x50, SeekOrigin.Begin);
+                    foreach (BattleAction action in actionList)
+                        binWriter.Write((UInt16)action.amount);
+
+                    binWriter.Seek(0x64, SeekOrigin.Begin);
+                    foreach (BattleAction action in actionList)
+                        binWriter.Write((UInt16)action.worldMasterTextId);
+
+                    binWriter.Seek(0x78, SeekOrigin.Begin);
+                    foreach (BattleAction action in actionList)
+                        binWriter.Write((UInt32)action.effectId);
+
+                    binWriter.Seek(0xA0, SeekOrigin.Begin);
+                    foreach (BattleAction action in actionList)
+                        binWriter.Write((Byte)action.param);
+
+                    binWriter.Seek(0xAA, SeekOrigin.Begin);
+                    foreach (BattleAction action in actionList)
+                        binWriter.Write((Byte)action.unknown);
+                }
+            }
+
+            return new SubPacket(OPCODE, sourceActorId, playerActorID, data);
+        }
+    }
+}

FFXIVClassic Map Server/packets/send/Actor/battle/BattleActionX18Packet.cs

@@ -0,0 +1,63 @@
+using FFXIVClassic_Lobby_Server.packets;
+using FFXIVClassic_Map_Server.packets.send.actor.battle;
+using System;
+using System.Collections.Generic;
+using System.IO;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+
+namespace FFXIVClassic_Map_Server.packets.send.actor.battle
+{
+    class BattleActionX18Packet
+    {
+        public const ushort OPCODE = 0x013B;
+        public const uint PACKET_SIZE = 0x148;
+
+        public static SubPacket buildPacket(uint playerActorID, uint sourceActorId, uint animationId, ushort commandId, BattleAction[] actionList)
+        {
+            byte[] data = new byte[PACKET_SIZE - 0x20];
+
+            using (MemoryStream mem = new MemoryStream(data))
+            {
+                using (BinaryWriter binWriter = new BinaryWriter(mem))
+                {
+                    binWriter.Write((UInt32)sourceActorId);
+                    binWriter.Write((UInt32)animationId);
+
+                    //Missing... last value is float, string in here as well?
+                    
+                    binWriter.Write((UInt32) actionList.Length); //Num actions (always 1 for this)
+                    binWriter.Write((UInt16)commandId);
+                    binWriter.Write((UInt16)810); //?
+
+                    binWriter.Seek(0x58, SeekOrigin.Begin);
+                    foreach (BattleAction action in actionList)
+                        binWriter.Write((UInt32)action.targetId);
+
+                    binWriter.Seek(0xA0, SeekOrigin.Begin);
+                    foreach (BattleAction action in actionList)
+                        binWriter.Write((UInt16)action.amount);
+
+                    binWriter.Seek(0xC4, SeekOrigin.Begin);
+                    foreach (BattleAction action in actionList)
+                        binWriter.Write((UInt16)action.worldMasterTextId);
+
+                    binWriter.Seek(0xE8, SeekOrigin.Begin);
+                    foreach (BattleAction action in actionList)
+                        binWriter.Write((UInt32)action.effectId);
+
+                    binWriter.Seek(0x130, SeekOrigin.Begin);
+                    foreach (BattleAction action in actionList)
+                        binWriter.Write((Byte)action.param);
+
+                    binWriter.Seek(0x142, SeekOrigin.Begin);
+                    foreach (BattleAction action in actionList)
+                        binWriter.Write((Byte)action.unknown);
+                }
+            }
+
+            return new SubPacket(OPCODE, sourceActorId, playerActorID, data);
+        }
+    }
+}