No need for low HPS. I think I have pulled down 60/70% to nill of health with a single rotation in Combat, when the Crit Gods are on my side. Everyone remains surprised sometimes even me that really makes it special.
With fanged god form , it's really potent in solo ranked too, but sadly... you are very exposed if there are multiple stealthers in enemy team. In case you manage to vanish , they will chase you and and you won't be able to vanish again = 1000 % dead, unless some miracle happens.
And without fanged, It;s just mediocre and there is no reason to pick it .