Adamant Poliwrath peaks at 478 Speed, which isn't even enough to outspeed Scarf Palkia. Defensive Kyogre is also a Pokemon that Poliwrath can't OHKO at +6, which is pretty pathetic, actually.
Whatevs sig. QC member for OU and Ubers, VM me for a look at your analysis. Just make sure it's good.
Also, if you want me to rate your team (OU/DW OU/Ubers), give me a VM. If I don't rate it, it's either 1) it's so shit it's too much trouble, 2) I'm busy, or 3) the team is fantastic and I have nothing I can suggest to you. You should be able to recognise which one.