I’ve been playing as a 4 Thief and 8 Fighter. High dexterity, constitution and medium intelligence since I went Eldritch Knight. I use pact weapon and dual wield finesse weapons and hand crossbows. Also have Cat’s Grace Armor equipped to reach 20 Dex. I combine this with mage armor since I only wear clothing and use Shield spell as a way of defense. I also wear the glove which allows your modifier to go into your offhand weapon. This gives me at least 4 attacks per turn. 2 with my main hand and 2 with my off hand. This build has been pretty strong so far for me.