I'm creating a fun villainous figure for my campaign. The choice has fallen on a Paladin-Warlock hybrid. The general idea is to take 2 levels in Paladin for Divine Smite, and then pound 4-5 levels into Hexblade Warlock. Blade-summoning for the flavour, good at all distances, quite mobile, and pretty tanky due to allowed armour-class.
Since Hexblade warlock can use his Cha for attack rolls, will it stack with his Str or Dex modifier depending on the weapon? Or will I have to add my Cha mod instead of those stats?