If you believe warriors are tanks you are actually delusional.
I am sort of for nept nerf but buff krak sword damage. Btw cinco nept isn't what you need to nerf, you need to fix its proc damage with damage on the character. When the damage stat is buffed neptaris gets an insane damage increase. Conduct some tests on the elite zodias map 1 boss and figure out a damage cap for the sword that makes it still useful but not 4shot the boss. Keep in mind nept is a hit or miss proc too, mages and rogs actually clear the boss faster than nept as well.