Is your Galactic War too hard? Here is some help.

Multiple teams is key.

I had my B team as Palp, Vader, Tarkin, TFP then either Boba or Daka depending on the opponent (Boba v Boba always for execute).

My A team was my arena First Order. I think from 61/150 until I could sim it I didn't lose a single GW.

Some days it would take an hour to beat one node with 30 attempts but you eventually crack it.