After 1 day of Kael, I've found that relying heavily on time bombs, using it both for the damage and, at level 13, the cooldown reduction, you can clear several heroes enemies at once. Just let the phoenix lean in on them or their creeps, since it's only a 40 second CD.

They need to list the talent descriptions before I make additional builds. Just know it's all about the combos. D W W, or D E if you have to fight multiple enemies. Bring up the phoenix and just about everyone melts, though it can be distracted by creeps too.