I'm going to a local team-tournament. I'm playing Nids and he's playing Chaos Space Marines, I've decided to take:

3x7xGenestealers
-EC

420 points

1x4 Warriors
-TS
-EC
-Leaping
-RC + ST
-AG (I+WS)
-FH

180 points

Total: 600.

My ally will have the following:

10 x marines
-Power fist
-2xPlasma

7xchosens
2xpair of Lighning claws
1xpower weapon
1xpower fist
1xflamer.

7xhavoks
2 x heavy bolters
2x autocannons

This is roughly what he said he will have.
Shall I change anything, any strategies I should use? - any help is appreciated, thanks!