Power to shields was one of my favorite cards! I was facing a fenn + mak + shyla (who had gotten full sweep) + vinto. While it didn't help much with vinto, it was amazing against everyone else! I could actually keep units on the board!
I also wouldn't say mortar and PtS are the only good cards either. If you have jet/heavies the 2 1 xp cards become pretty good, and the other 3 xp card also become pretty good!
Edited by MadFuhrer