I’ve also been having solid success the last couple days using Rey lead, JKL, GAS, JKR, Hermit Yoda - main key is NOT using ultimate unless absolutely necessary to save a character, but to use health steal/heals to keep transitioning at least one back and forth across the whirlwind trigger point every round, and using Mark to circumvent damage immunity - then laying the final smack down on Kenobi with ultimate.
(Of course, this will probably only be reliable for a day or two, once CAT shows up you will probably have to drop a damage dealer for a pre-taunt)