what benefits would I get from multiclassing
besides the armour and spells you mean?
anyway Warlock is the stronger class because it uses charisma to do everything; fight melee, range attacks and spells which means it also makes a great party face and better prices
a drow has hand crossbow [one in each hand] which means they can do a range attack as a bonus action and that means you can toss a bottle of water on the ground for free, shoot it as a bonus action to make a target wet then hit that target with ice or lightning magic all in the same turn
on the other hand a Ranger is more basic to learn with arrows and a pet he has limited options and that [simpler] playstyle works for some people
