Set Suggestion for: Poliwrath
Give it a moveset based on belly drum instead. Set basically had belly drum(mandatory) waterfall/liquidation(either), drain punch/close combat(either), substitude/darkest lariet/poision jab/earthquake(either) with a sitrus berry as its item and swift swim as the ability.
This way, when poliwrth gets off a belly drum, it can be a good dynamax sweeper with max geyser to boost its speed, high power and end game potential.
The original set is considered bad for most games since it struggled against too much pokemon even with life orb and rain up.
Seismitoad is better as a swift swimmer in randbats since it has stab earthquake as a better secondary stab (outside of water obviously), also with water absorb on some sets instead for the suprise factor, therefore having an overall better performance than Polirath.
Poliwrath Lacking a 4x weakness to grass isnt that useful when it's typing is still worse than Seismitoad whose had a more useful defensive typing and better bulk.
That set is bad and should be replaced.
The belly drum set is much better, but I think its level needed to be lowered, so it would be too broken (maybe?).