1 Minotaur
4 Chaos Warriors
6 Chaos Beastmen
The main of this team is to cause as many casulties as possible.
I have only been playing single games so I don't get the whole concept of buying re-rolls in leagues (do they regenerate after each game?). I could go 2 RR 3 FF or modify that. I want to keep all my big hitters though (keep in mind I will mostly be playing single matches).
In the future some friends are considering creating a league type structure with 4 or 5 teams. My main aim in that would just to hurt as many people as I can, stuff winning

My questions are:
1) What would be the best formation for this? My idea was Minotaur in the middle of LOS with 2 Warriors either side. Then stagger the Beastmen behind them so I can move them where needed (they can blitz and with Horns get +1 strength). Hold one or two Beastman at the back in case of any line breakthroughs and to get the ball (and throw to a warrior).
2) I want to use a Warrior as ball-carrier (if I ever bother to get the ball) because it would be hard to hit him with ST 4, but my question is can I give a warrior big hands? I have seen a lot of mutant beastmen minatures but no mutant warriors. If I can't should I just give him the Sure Hands skill instead?
3) Are claws a good mutation for mauling people? What skills/traits/mutations are good for mauling people for that matter? Is Pile On a good one on a Beastman? (standing up and giving blitz would give him +1 ST from horns)