Darth Sidious Ability Upgrade Path

First upgrade should be his healing immunity only because its on the fastest timer so you would get more benefit out of raising it. Second should be that heal. It has saved him for me so many times in PVE. I would do the AOE last not because it isn't a good skill but because the recharge timer is extremely slow and the upgrades aren't all that impressive or gamebreaking to focus on it first.

Seems logical. Thanks.

i am abit torn between upgrading his deathstroke or sadistic glee. Both seems good either way.