Exactly How?

How did they ruin teh Monk farming build?

Monster AI now makes monsters run away from aoe spells...so symbol of wrath and similar aoe spells will be less effective...although ive found that monsters dont typically run away from balthasaurs aura...that isnt definite though just my observation

hope this helps

Please read other thread's which explain the update, and maybe you can improve "teh" english.