Honestly looking at some of the insane detail put into hunter cloaks it would be awesome if Titans could seriously get in on cooler looking attire. Even throwing it out to my Warlock buddies, you guys could use love too. Hunters are really the poster kids.
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What if instead of a dumb arm band the warlocks could get their hands/ arms to glow somehow according to their choice of faction? It could play into a story line like each faction has a warlock "college" where they train you to use their powers, and since the warlock power flows through their hands .... ?? Just toying with ideas here.