* 1d6 by sneak not 2d6
somwhere I read that hex doesn't stack with Magic Missiles, but hexblade curse does, so it could be 3d4+12 = 19,5 dmg...Vhuman - magic initiate (hex or hunters mark) - Wizard. Bonus Action - hex, Action - Magic missiles -> 3d4+3 + 3d6 = 21 dmg and no attack roll. Or am I wrong? And two slots remain for doing it again next two turn.
Hex is bonus action casting time. And if you can't use hex, you can use hexblade curse +2 dmg to each missile 3d4+9RAW, Hex only applies extra damage when you hit with an attack - Magic Missile is straight damage, not an attack roll, so I guess it wouldn't apply. Definitely up for interpretation, though.
Also, I don't think you can cast two spells in one turn.