suddenly impossible to beat Artist of War Mythic???

Shouldn’t take more that 2 or 3 tries with a good team, so you may want to check mods. I used:
G12 zzThrawn
G12 zzVader
G11 EP
G12 DT
G11 Shoretrooper
Just keep EP alive long enough for Phoenix to kill themselves. I fractured Kanaan, then hard kill Sabine and Ezra, then any order after that. Once those 2 go down they don’t have the offense to be a threat.