Give me a reason as well why you use these - Maybe related to what you do in the game, perhaps?
Only vote for the character that you use mainly. If you use them equally, pick your favourite combination for all situations :)
Need these rough statistics!
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You need to classify pve or pvp? It makes a difference with Titans for one because defender=pve. striker=pvp. Warlock. Sun singer(pve or sometimes trials) void walker pvp . Hunter. Honestly both are pvp but invisibility for raids