With what ya got, 4 or so Crisis Suits, with dual PRs. The AP2 gun really hurts, and JumpShootJump makes the very durable. Be sure the table is adequately filled with
LOS blocking terrain.
Don't glue on your guns. Search the 'Net for articles on using magnets to swap guns ... for the Crisis Suits.
Stealth Suits with the BurstCans are okay, but Crisis are better, tougher and with more wounds.
For future purchases, wait until the new codex comes out,