I tried the 3* Antigua against devilites in a T2 mission and it was the most tedious thing I'd ever done. Not a moment went by in which I didn't wish I'd brought a Magnus instead. The little jerks constantly dodge. Unlike with Magnus, the shots don't root them in place so I have to keep my aim trained on them. Due to lag there's no way to hit them mid-dodge, and since auto-aim doesn't work while you're moving I have to give up the one benefit the gun has if I hope to hit anything. I did not feel like I got hit any less than while using Magnus, either.
Pretty much the only way to make this gun usable against devilites was to run up in their faces and spam bullets at point blank. It worked, but at that point why not just get a sword?
Meanwhile, Magnus does lots of damage, will inflict stun, staggers up devilites so that you can unload both shots at them in succession, and has a charge attack that lets you just about kill them in one shot from outside of the range of their projectiles. I feel safe using Magnus against devilites. With Antigua, I just felt frustrated.
a part of the reasons was because of vanaduke. But people already get accustomed with blitz needle so ...
I guess greaver would die easier on piercing antigua.