Tested it. Not really working. Not because of your bot, but because Bot Manager won't recognize some monsters that are kinda in a "stuck position". This can be fixed however, with an aoe class like Lycan/DKS/Pyromancer/etc.
Might be just for me, but i doubt that.
//If you want it to be more effective for this issue, i suggest going for this:
join feverfew
move r4; bottom
delay x ms
attack LOCKED CHEST
move r3; Top
This will mean that it will aoe strike the target, kill it, move to another room and complete the quest, rather than attacking 3 times and completing the quest after that (which might be delayed because you may still be attacked), making it less time effective. Again, this is just for the guys that experience my issue.