I hate to break it. I dislike some ast that keeps drawing cards to get the balance. Like they r wasting their cards.
Drawing 3-6 turns trying to get a balance cuse its the new thing to do and only "good card" they think it is annoys me and tell them that theyr a bad ast. thats my opinion.

Back to OP.
Depends. Somtetimes i use enchanced on a guy that does the most dps. Or enchanced + bole on a tank or those whi got brink of death + time.
Also its random so it might be aoe balance/arrow/spear to all and keep my ewer for myself or to brd