My RS/HP Poliwrath decimates Tyranitar, Rhydon, and Golem. Steelix too. That is what I use him for at least.
I think all your Poliwraths have decent move sets except RS/IP, can't see a use except for defense which is illogical.
Edit: Let me clarify. RS/IP doesn't have any use in attack, so that only leaves defense. And while IP might be SE against some attackers, it just really isn't that good, as explained in my answer down below.