zEP, Vader, Thrawn, Tarkin and zIPD is a hard counter to bugs if there modded right.
Swap TM with iPD and get TL on Brute, use Vaders Forcecrush and Culling Blade to start the TM train, fracture Alpha push back TM with Tarkin and start applying shock to everyone after you use EP aoe stun. Then stun them again.
You need to control Poggle and Alpha with Vaders Abbility Block to make sure they didnt cleanse.
If you didnt have IPD go for DT an TFP instead of Tarkin and IPD.
Sadly, this squad is also a good Padme counter so i normaly use zzTraya and Sion against the Bugs.