True, true. Using any MG on Crota is, tbh, a bad idea, as you're either out of range or at risk of boomer fire. I like SGA (and Invective) for containment shield destruction. It may not be the best exotic, but I'm saying it has its place. If your only exotic is SGA, don't worry, it's good enough to get you all the way through VoG and half of PoE. Can't say the same of NLB!