7: Defender
The Titan Defender, the subclass that normally tops our list of best PvE classes, resides towards the bottom of our regular Crucible PvP list. Why? Because its main utility, the Ward of Dawn AKA Titan bubble, requires people to be foolish enough to either walk in or hang around it order to get any kills out of it.
Sure, you can lock down a Control point or Salvage a relic easier but in pure deathmatch based modes, Defender is really lacking. Yes, there is the old Ward of Dawn orb of light spam, but only novice or unorganized teams should actually have a hard time with that. Besides Ward of Dawn, Defenders have Magnetic Grenades which are pretty great as far as sticky grenades go but have a melee that only triggers when it gets a kill. Defenders, are still very usable in PvP despite being towards the bottom of this list, but they are just very geared towards objective based game types to be worth it.