Trying to imagine what their melee skills would be. Maybe a chain lightning melee for the warlock that zaps up to two nearby enemies with arclight for 50% of normal melee damage. Would work well especially if the theme is crowd control. I have no idea what the hunter would get since gunslinger has throwing knives and blade dancers have blink strike. I doubt it would be energy related since thats the warlocks thing. A hold to charge solar uppercut for the titan would be awesome.