^.^
Right now my party would probably be a Drow warlock, Shadowheart, Astarion, and Wyll. Wonder if we could do it without a warrior.. and Im curious about having two warlocks in the party. Ill do a second playthrough as a wizard with Lae'zel, and Im not terribly interested in Gale right now.
The little we know about Wyll is that he "Noble by birth, Wyll made his name as the heroic 'Blade of Frontiers'. He keeps his pact with a devil well-hidden, and is desperate to escape the hellish bargain - even if that means rescuing the seductive creature that made the deal." so maybe he is a hexblade.
If that´s the case with a hexblade and a cleric you could have, in theory, a strong frontline. But we have to see what the game requires.