1. Thanks for the answer Jvela, it's much appreciated.
2. Placelord, you're thinking about overall damage, but think about it this way: While tanking Kuzman, you need half a clip (as example, sometimes a third is enough). Without bigger clip, you can shoot 10 shots before shield and reloading, with larger clip you can shoot 15 shots before shield and reloading.
So it's not useless, but it is way less useful than it could have been, and other cards are probably a better fit now. I'm going with fade to black and professional probably, since recoil and spread of barrier are already good.