Team Dynamics
Just as important as what characters you pick when forming your team is which assists you pick with them. None of your characters play this alone (unless they're the last one standing, and then you're pretty f*ck*d). Rushdowns become extremely deadly with the right assists, allowing for reliable unblockable setups or safer approaches towards an enemy zoner. Zoners get much safer to play when you have a good defensive assist that helps push opponents back out when they get close. There is not a single character in this game that does not benefit greatly from an appropriate assist, and if you're not using them, you're not playing Marvel vs Capcom 3 right.