I've tended to prefer to build characters that are melee with arcane features. But 5e seems to have some features that might make me think differently. The advantage/disadvantage rules, particularly for height advantage will favour ranged combat and mobility. Magic has also changed and is quite a bit more flexible.
Something like an arcane trickster would be my first guess, using Lae'Zel, Shadowheart and whichever of Gale or Wyll seems a better fit. Probably something elfy as a race, but I'd need to look more carefully at the 5e rules and how Larian implement them, which I won't do until there is an EA.
