I main a Titan. I use striker in crucible and I do decent. I love the shoulder charge. If catch people around corners they won't have enough time to react even if the have a shotgun equipped. I use the armmentarium chest piece. (Probably not spelled right) The double grenades is awesome. I also use the Lightning grenade. The best part about that is you can corner people. And you will want to use a shotgun. Hope this helps.