I feel titan armor should have more defense so they take more damage. It makes no sense for my Warlock to have as much defense as a Titan. On the flip side, warlocks should do more damage since they die easier. Hunters should be in between. Edit: no need to swap abilities between sunsinger and titan, simply require the titans to have the sunsinger mechanics. Sun singer isn't a full DPS subclass like the void walker glass cannon.