Best build for using Titanias melee. Titanias wind up speed is 0 so her heavy attack scales with attack speed. [Primed Reach] is nice but titianas melee range is still single target; all it does its allow you dash in from farther away with her melee. My recommendation focus on single target. Spam heavy attack and watch lv 115 or higher heavy gunner melt as you never die due to life steal. I use arcane precision and energies or velocity but [Fury] is great too.
I used arcane [Fury], R5 [Primed Fever Strike] and the regular [Fury] mod in the video.