Overall, titans are the best. Defender is still the best hard mode PvE super in the game, that's for sure. Strikers are really good in PvP cause of their kit. Really good grenades, a super to shut down others, titan skating, juggernaut, increased sprint speed, etc Sunbreakers are still pretty decent in both easy PvE and PvP. For PvE just spam as many sunspots as you can, for PvP pick the perk that lets you spam shoulder charge in your super. And yet, here I am, a Warlock main. I cannot master titan skating for the life of me, which is pretty much its biggest plus.