I am loving the new Monk
All mythic, 20, 3 traits. Monk blocks no mana, can typically barrier the entire team when cast which helps against AE (Kraken renders it moot though). Or I can use it to hit enough red/purple to fill DS. Or I can cleverly use it to make a 4+ match.
As for defense, if the event is "kill xyz" type I'll build a defense of 4 of them. If not, I like to switch it up.