Just curious, does anyone use shotguns in PvE? I've only used them in once situation, back when I was still in blue status. I used one to one-hit the shields off the Knights in the Phogoth strike. Haven't really experienced a situation where they would be preferred to primaries, fusion, snipers, etc.
Invective is ok, wouldn't bother with it on Nightfall or anything though, lol.