If you are already done with your elite Pokémon, I'd say go for it if you need another defender. Poliwrath is a great defender and Bubble / Ice Punch is a good moveset. Does not quite reach the damage of Hydro Pump, but covers its weaknesses better.
I'm surprised how difficult people seem find dodging bubble and I've been very satisfied with my Poliwrath with Bubble / Hydro Pump. I don't regret leveling it up to level 30. My Poliwrath has 91% IV's and at level 30 it has 2126 CP.