Any tips you could give to me?
Best class combination:
Heavy - Medic, preferred with full uber charge.
Scout - Sniper, you always need cover.
Engineer - Pyro, to make sure spys don't start "Sappin' mah sentry!"
Soldier - Soldier, best for offensive attacks.
Engineer - lvl3 Sentry - lvl3 Dispenser, also a teleport to the hold out from spawn.
UBER SETS:
Heavy - Heavy - Medic - Medic - Medic, "I love this doctor!"
Engineer - lvl3 Sentry - Engineer - lvl3 Sentry - Pyro - Pyro, "Spah gettin' sapped"
Uber Medic - Uber Medic - Heavy - Sanvich, "When you see my face, hope it gives you hell, hope it gives you hell!"