So I used Gryz's method of setting up escape tiles. Now my thief seems to just go for the escape tile before the treasure chest; however, before I set up the escape tile it used to steal from chests as normal. if you don't want to read through the whole EA file, here are its AI bytes: [0x06,0x05,0x09,0x00] (exactly matches the LootFromChests macro).
[spoiler=EA File] #include EAstdlib.event EventPointerTable(0x15,Pointers) ORG 0xDA2650 Pointers: POIN Turn_events POIN Character_events POIN Location_events POIN Misc_events POIN BallistaData BallistaData POIN Bad Bad Bad Bad POIN Good Good Good Good POIN Opening_event Ending_event Opening_event: TEX8 0x80D [200,00] STAL 60 RETB LOU1 Shriners ENUN CUMO [7,18] STAL 60 CURE TEX1 0x82F MUS1 0x0032 TEX1 0x834 REMA LOU1 Bad ENUN CUMO [16,14] STAL 60 CURE TEX1 0x835 REMA MOVE Jerme [07,16] ENUN CUMO [07,16] STAL 60 CURE TEX1 0x836 REMA MOVE Jerme [14,07] ENUN CUMO [14,07] STAL 60 CURE TEX1 0x83A REMA MOVE MorphLloyd [13,07] ENUN TEX1 0x83B REMA KILL MorphLloyd MOVE Jerme [17,07] ENUN DISA MorphLloyd DISA Jerme CAM1 [07,16] CUMO [07,18] STAL 60 CURE TEX1 0x838 REMA MOVE Marcus [09,18] STAL 30 FIGH Marcus 0xC1 GothamFight $00000000 KILL 0xC1 UNCR Marcus 0x02 LOU1 Good CUMO [03,02] STAL 60 CURE TEX1 0x83C REMA MOVE 0xD3 [03,03] MOVE Marcus [02,03] ENUN CUMO [03,03] STAL 60 CURE TEX1 0x837 REMA CUSI Marcus Ally STAL 1 MOVE 0xD3 [00,00] ENUN DISA 0xD3 LOU1 ExtraBaddies ENUN LOU1 DatThief ENUN STAL 30 LOU1 ShrineGuards ENUN CUMO [02,18] STAL 60 CURE TEX1 0x83D REMA CAM1 [05,05] CUMO [03,02] STAL 60 CURE TEX1 0x83E REMA TEX6 0x5 [00,00] 0x80A _ASM0x42 0x83181 TEX6 0x5 [00,00] 0x809 _ASM0x42 0x83181 IFYN 0x01 MOVE Lowen [00,00] ENUN DISA Lowen ENUN LOU1 DialogueDeploymentLowen ENUN CUMO [01,19] STAL 60 CURE TEX1 0x83F ELSE 0x01 ENIF 0x01 ENUF 0x01 ENIF 0x01 ENDA Ending_event: ENDA Good: UNIT Lyn_t LynLord 0x00 Level(1,Ally,False) [00,00] [03,02] [steelSword,Vulnerary,Vulnerary,0x00] [0x00,0x00,0x00,0x00] UNIT Lowen Cavalier 0x00 Level(1,Ally,False) [00,00] [02,02] [ironSword,IronSpear,0x00,0x00] [0x00,0x02,0x09,0x00] UNIT Serra Cleric 0x00 Level(1,Ally,False) [00,00] [01,02] [Heal,Vulnerary,0x00,0x00] [0x00,0x00,0x00,0x00] UNIT Matthew Thief 0x00 Level(1,Ally,False) [00,00] [04,02] [ironSword,0x00,0x00,0x00] [0x00,0x00,0x00,0x00] UNIT Kent Cavalier 0x00 Level(2,Ally,False) [00,00] [03,01] [ironSword,IronSpear,Vulnerary,0x00] [0x00,0x03,0x00,0x20] UNIT Sain Cavalier 0x00 Level(2,Ally,False) [00,00] [02,01] [ironSword,IronSpear,Vulnerary,0x00] [0x00,0x03,0x00,0x20] UNIT Erk Mage 0x00 Level(1,Ally,False) [00,00] [02,03] [Fire,Vulnerary,0x00,0x00] [0x00,0x00,0x00,0x00] UNIT Bad: UNIT Jerme Thief 0x00 Level(20,Enemy,False) [17,18] [16,15] [KillingEdge,WindSword,Elixir,0x00] [0x00,0x03,0x00,0x20] UNIT Erik Cavalier 0x00 Level(15,Enemy,False) [17,18] [16,14] [Javelin,SteelSword,Vulnerary,0x00] [0x00,0x03,0x00,0x20] UNIT 0xBA Soldier 0x00 Level(5,Enemy,False) [17,18] [15,16] [Javelin,0x00,0x00,0x00] [0x00,0x03,0x00,0x20] UNIT 0xBA Soldier 0x00 Level(5,Enemy,False) [17,18] [16,17] [Javelin,0x00,0x00,0x00] [0x00,0x03,0x00,0x20] UNIT 0xBA Soldier 0x00 Level(5,Enemy,False) [17,18] [17,16] [Javelin,0x00,0x00,0x00] [0x00,0x03,0x00,0x20] UNIT 0xC1 Mercenary 0x00 Level(3,Enemy,False) [17,18] [11,18] [ironSword,0x00,0x00,0x00] [0x00,0x03,0x09,0x00] UNIT 0xB9 Archer 0x00 Level(3,Enemy,False) [17,18] [10,17] [ironBow,0x00,0x00,0x00] [0x00,0x02,0x09,0x00] UNIT 0xB9 Archer 0x00 Level(3,Enemy,False) [17,18] [10,19] [ironBow,0x00,0x00,0x00] [0x00,0x02,0x09,0x00] UNIT ExtraBaddies: UNIT 0xBA Soldier 0x00 Level(2,Enemy,False) [17,07] [12,05] [Javelin,0x00,0x00,0x00] PursueWithoutHeed UNIT 0xBA Soldier 0x00 Level(2,Enemy,False) [17,07] [16,08] [ironSpear,0x00,0x00,0x00] PursueWithoutHeed UNIT 0xBA Soldier 0x00 Level(2,Enemy,False) [17,07] [13,04] [Javelin,0x00,0x00,0x00] PursueWithoutHeed UNIT 0xC1 Mercenary 0x00 Level(3,Enemy,False) [17,07] [11,07] [LongSword,0x00,0x00,0x00] [0x00,0x02,0x09,0x00] UNIT DatThief: UNIT 0xA4 Thief 0x00 Level(3,Enemy,False) [00,14] [01,10] [ironSword,LockPick,0x00,0x00] [0x06,0x05,0x09,0x00] UNIT ShrineGuards: UNIT Lucius Monk 0x00 Level(5,NPC,False) [00,19] [02,18] [Lightning,Vulnerary,0x00,0x00] [0x00,0x02,0x09,0x00] UNIT Oswin Knight 0x00 Level(4,NPC,False) [00,19] [03,19] [steelSpear,Vulnerary,0x00,0x00] [0x00,0x02,0x09,0x00] UNIT Shriners: UNIT Marcus TransporterHorse 0x00 Level(1,NPC,False) [00,19] [08,18] [steelBow,Elixir,0x00,0x00] [0x00,0x03,0x00,0x20] UNIT 0xD3 0x1F 0x00 Level(1,NPC,False) [00,19] [07,18] [0x00,0x00,0x00,0x00] [0x00,0x00,0x00,0x00] UNIT MorphLloyd Swordmaster 0x00 Level(20,NPC,False) [00,19] [07,17] [0x00,0x00,0x00,0x00] [0x00,0x00,0x00,0x00] UNIT DialogueDeploymentLowen: UNIT Lowen Cavalier 0x00 Level(1,Ally,False) [00,20] [01,19] [ironSword,IronSpear,0x00,0x00] [0x00,0x02,0x09,0x00] UNIT Reinforcements1: UNIT 0xC6 Fighter 0x00 Level(4,Enemy,True) [00,14] [06,12] [ironAxe,0x00,0x00,0x00] [0x00,0x02,0x09,0x00] UNIT 0xC6 Fighter 0x00 Level(4,Enemy,True) [00,14] [08,11] [Halberd,0x00,0x00,0x00] [0x00,0x02,0x09,0x00] UNIT 0xC6 Fighter 0x00 Level(4,Enemy,True) [00,14] [07,13] [ironAxe,0x00,0x00,0x00] [0x00,0x02,0x09,0x00] UNIT 0xBA Soldier 0x00 Level(3,Enemy,True) [17,07] [13,08] [Javelin,0x00,0x00,0x00] PursueWithoutHeed UNIT 0xBA Soldier 0x00 Level(3,Enemy,True) [17,07] [12,05] [ironSpear,0x00,0x00,0x00] PursueWithoutHeed UNIT 0xBA Soldier 0x00 Level(3,Enemy,True) [17,07] [14,06] [Javelin,0x00,0x00,0x00] PursueWithoutHeed UNIT Reinforcements2: UNIT 0xA4 Thief 0x00 Level(3,Enemy,True) [10,00] [10,00] [ironSword,LockPick,0x00,0x00] [0x06,0x05,0x09,0x00] UNIT 0xBB Cavalier 0x00 Level(5,Enemy,True) [08,00] [06,02] [Javelin,0x00,0x00,0x00] [0x00,0x02,0x09,0x00] UNIT 0xBB Cavalier 0x00 Level(5,Enemy,True) [08,00] [05,01] [ironSpear,0x00,0x00,0x00] [0x00,0x02,0x09,0x00] UNIT Reinforcements2x: UNIT 0xCB Mage 0x00 Level(3,Enemy,True) [17,17] [13,17] [Fire,0x00,0x00,0x00] [0x00,0x02,0x09,0x00] UNIT 0xCB Mage 0x00 Level(3,Enemy,True) [17,19] [13,19] [Fire,0x00,0x00,0x00] [0x00,0x02,0x09,0x00] UNIT Reinforcements3: UNIT 0xBA Soldier 0x00 Level(3,Enemy,True) [17,07] [13,05] [Javelin,0x00,0x00,0x00] PursueWithoutHeed UNIT 0xBA Soldier 0x00 Level(3,Enemy,True) [17,07] [12,07] [ironSpear,0x00,0x00,0x00] PursueWithoutHeed UNIT 0xBA Soldier 0x00 Level(3,Enemy,True) [17,07] [15,08] [Javelin,0x00,0x00,0x00] PursueWithoutHeed UNIT 0xBB Cavalier 0x00 Level(4,Enemy,True) [17,18] [13,19] [Javelin,0x00,0x00,0x00] [0x00,0x02,0x09,0x00] UNIT 0xBB Cavalier 0x00 Level(4,Enemy,True) [17,18] [13,17] [ironSpear,0x00,0x00,0x00] [0x00,0x02,0x09,0x00] UNIT Reinforcements4: UNIT 0xCB Mage 0x00 Level(3,Enemy,True) [00,00] [01,01] [Fire,0x00,0x00,0x00] [0x00,0x02,0x09,0x00] UNIT 0xCB Mage 0x00 Level(3,Enemy,True) [00,00] [03,00] [Fire,0x00,0x00,0x00] [0x00,0x02,0x09,0x00] UNIT 0xCB Mage 0x00 Level(3,Enemy,True) [00,00] [00,02] [Fire,0x00,0x00,0x00] [0x00,0x02,0x09,0x00] UNIT 0xBB Cavalier 0x00 Level(4,Enemy,True) [00,00] [04,01] [Javelin,0x00,0x00,0x00] [0x00,0x02,0x09,0x00] UNIT 0xBB Cavalier 0x00 Level(4,Enemy,True) [00,00] [02,03] [ironSpear,0x00,0x00,0x00] [0x00,0x02,0x09,0x00] UNIT Reinforcements4x: UNIT 0xCB Mage 0x00 Level(3,Enemy,True) [00,20] [01,18] [Fire,0x00,0x00,0x00] [0x00,0x02,0x09,0x00] UNIT 0xCB Mage 0x00 Level(3,Enemy,True) [00,20] [02,20] [Fire,0x00,0x00,0x00] [0x00,0x02,0x09,0x00] UNIT 0xCB Mage 0x00 Level(3,Enemy,True) [00,20] [03,18] [Fire,0x00,0x00,0x00] [0x00,0x02,0x09,0x00] Turn_events: TurnEventPlayer(0x05,Opening_event,1) TURN 0x00 ReinforcementsLoad1 [3,3] 0x00 0x00 TURN 0x00 ReinforcementsLoad2 [4,4] 0x00 0x00 TURN 0x00 ReinforcementsLoad3 [5,5] 0x00 0x00 TURN 0x00 ReinforcementsLoad4 [8,8] 0x00 0x00 TURN Character_events: CHAR 0x0E DaltontoPaul Lyn_t Lucius 0x000000 CHAR 0x0F PaultoBrigham Lucius Oswin 0x000000 CHAR Location_events: Door(17,04) Chest(KillingEdge,17,02) ChestMoney(2500,12,12) LOCA Misc_events: DefeatAll(Ending_event) CauseGameOverIfLordDies AFEV BallistaData: BLST ALIGN 4 ReinforcementsLoad1: LOU1 Reinforcements1 ENUN ENDA ReinforcementsLoad2: LOU1 Reinforcements2x ENUN CAM1 [08,07] STAL 30 LOU1 Reinforcements2 ENUN ENDA ReinforcementsLoad3: LOU1 Reinforcements3 ENUN ENDA ReinforcementsLoad4: LOU1 Reinforcements4 ENUN CAM1 [04,15] LOU1 Reinforcements4x ENUN ENDA GothamFight: AttackerCritical(30,True) BLDT DaltontoPaul: MUS1 TogetherWeRide TEX1 0x841 REMA MUEN 2 CUSI Lucius Ally ENDA PaultoBrigham: MUS1 TogetherWeRide TEX1 0x840 REMA MUEN 2 CUSI Oswin Ally ENDA