Her default gun is my favorite one of hers. You'll see how good it is once you upgrade the stats. It plays to her skill-set more than the others as the effective range is very close to your CQC engagement distance, so you tag an enemy, then move in for pretty much a guaranteed kill. Tagging and then striking will kill just about anything in the game in a very short time, with the exception of elites carrying aleph due to their special attacks. I think she would move into OP-tier if she had hitscan impregnating bullets, right now the only counter is to either kill her from range, or don't get shot. If she shoots you and gets close, you're dead.
If you want long distance, use Raceme. If you want a more traditional shotgun feel, use Wasp. If you want to dominate close combat, use MM-6C.
I have a few videos where I use Hive, don't record all of them:
https://www.youtube.com/watch?v=2Y4R0awuceUhttps://www.youtube.com/watch?v=Zrbjvu8uiqoI have 3 other Hive videos as Raider, but they were all involving a hacker and all before the Hades update. She has become way better since then, thanks to the forge system and better cards.