Just play as defender and you'll pretty much welcomed to any raid. Learn or ask where to place bubbles, when to switch from blessing of light to armour of light, when to use bastion(longer bubble time) or gift of the void(damage to bubble makes orbs). Suppresion grenades can be pretty handy at times, stops captain or minotaurs from teleporting for a while. Also if you got too many titans, sunbreakers melting point has a short debuff time but it's possibly the strongest debuff out there, plus it the super with explosive pyre is pretty good for ad control.

Skate into a wall and die so much that your left bumper falls off.