Titan- have bubble with armour and weapons of light, if they have helm of St 14 then there will be no stopping them.. They also have striker which can destroy a big group of enemies in one super Warlock- Nova bomb with the 3 Nova bomb perk thing can destroy a big group of enemies and if you have the obsidian mind and bad juju you'll be able to rek face and of course we all know why sun singer is good (2 lives) Hunter- golden gun with combustion and over penetration will be able to take out a group of enemies in a couple shots and blade dancer with the arc wave and mask of the third man will be able to destroy pretty much any group of low level enemies like thrall etc. So what I'm saying here is that all classes are good in there own way, if you want to add something that I missed then go ahead :)