Larian Studios Forums Divinity: Original Sin 2 Divinity - Original Sin 2 - General Lucky Charm and Thieving are gamebreaking.

They made Lucky Charm a worthy investment (it was much worse in the Early Access version and could loot perhaps an extra potion or fish at most), can potentially loot good rarity equipment especially early on, however you'll miss the other civil skills on that character and you'll have to let him loot every box and chest to fully benefit from the skill.

Keeping that in mind, in a multiplayer setting you'll need good communication and enstablished roles on who's doing what in the game world to make the most use out of the skill (nobody will touch or loot anything other than the player with Lucky Charm).

Also letting the Lucky charm character go first can potentially trigger conversations or events that would be best left to perhaps a Persuasion character. If the Lucky Charm character is the one looting, then on the long run, assuming a lot of looting is occurring it would be best for the character to also have some strength stat in order to be able to carry larger quantities of items in the inventory.