New to DnD. I was thinking of making an Archfey Warlock. Particularly for misty escape, it looks like mainly a misty step that triggers as a reaction in response to damage. Seems pretty strong as it's a patron feature, doesn't require one of my limited spell slots like if I casted misty step myself and it comes back on short rest. Not really into the fey presence, but maybe it might be useful. And the last otherworldly patron feature we'll have access to in 1.0 doesn't really interest me because it seems to only activate in response to an enemy charm. Maybe 1.0 will have enemies flinging charm left and right, but I can't remember that happening in any of my early access playthroughs.
Long story short, I was thinking Warlock 9 to get to 5th level spells, then Sorcerer 3 to get access to metamagic. Maybe use my metamagic to empower some eldritch blasts. What concerns me however is to the best of my knowledge I'll miss out on that 6th level spell from Mystic Arcanum. So veteran Dnd players, I'm calling on you. Does this seem like a viable build for BG3? And do the benefits of Sorlock outweigh that 6th level spell from Mystic Arcanum?