I have all 3 classes if you take a look moment to look at my profile. By far Warlock is my favorite class. I have voidwalker and sunsinger max. Obsidian Mind and Bad JuJu for crucible, and for PVE I run sunsinger with light beyond nemesis. I bought the heart of praxic fire last weekend just to have in my collection but I feel like I don't need it right now, but as a sunsinger it is definitely one to store in the vault. Titan can be fun when I'm in a group, I like to play the defender role with my st 14 helm. but running and gunning with the warlock and throwing fusion/solar grenades is a beast. if I'm paired up on the Roc strikelist or weekly heroic with another sunsinger I feel like there is no worries of us wiping because we can self-res and revive each other. If you do warlock go sunsinger all the way bro