4 skills to pick for chaos

[berserker]

Hello

My chaos team is developping well and after an easy 5-1 win vs dark elves (destroyed them in 1st half so he fielded only 3 players in 2nd half).

So far after 9 games:
CW block
CW Skill
CW
BM Skill
BM Skill
BM Block -Nig-
BM Block
BM Block
BM Block
BM Claw Block
BM Dirty Player
BM Guard, rolled double 3
BM Sure Hands -mng-
BM
Troll Block
3 RR
13 FF
40k treas

Next game is vs dwarf, no game vs dodgy teams in sight (at least 3 games) so no need for tackle right now

I was between Block and Guard for the CW
BM Kick and dirty Player
BM guard double is my major doubt

I like stand firm with guard but mutations are tempting too

Advice on the 4 skills welcome