Ages ago, I three starred the second tier of the Secrets and Shadows Assault Battle. The last few times it has come up, I can't make it past Sidious in stage 4. I have done a ton of work on my Nightsi...
I felt like stage 4 in the Bonus tier (tiers 1 and 2 are full auto walk away easy) was easier than normal this time. My PHX team (Hera, Ezra, Sabine, Zeb, Kanaan all gl10 or better no zetas) didn’t even have a member lose their protection to Sidious’ AoE and killed him before he used it again.
I use PHX in the bonus tier despite using NS (Talzin lead near arena meta power levels) on the other tiers. NS just seem to get hammered by Sidious much worse than PHX in the bonus tier.