Help with Underworld

I'm planning on taking Underworld to a tournament coming up, and I'm having a hard time deciding what to do with the double skills I have to distribute, since mutations come with normal skills.

I have two skills left to pass out, and they're both doubles, and I want to give them to the Linerats. The problem is, I'm so torn between wrestle, kick, block, and possibly taking guard.

Does anyone more familiar with this team know which would be more useful?

The other skills are block on the Troll, claw and mighty blow on both Blitzers, and block on both Throwers.

Thanks.