I think Titans are worst class, respectively (no hate on Titans, they just don't suit my play style). While they generate a ton of orbs, Ward of Dawn is simply useless in PvP, and Fist of Havoc isn't 100% ideal in PvE. Shoulder charge is nice, but I'd much rather have a medic bladedancer Hunter with invisibility to save my life than a Striker Titan. Hunters and locks have better grenades as well in my opinions. Warlocks' Sunsinger subclass is hands down the best subclass for solo end-game content. Being able to revive yourself has saved me and my fireteam a thousand times in raids and nightfalls, where as whenever i see everyone's dead and its up to a Titan, I just moan and lose all faith in them and say "ok I'm ready to restart this boss." Again this is all my opinion, still gotta have respect to some Titans considering some of my friends are very good with it and I respect them.