Basic common sense the clown said
Fucking idiot, if Enma is forcing MORE Haki than Zoro wants to use, it's indirectly increasing its output attack.
If Zoro uses 1 point of Haki by himself while Enma forces 2 points of Haki, then that attack is stronger, because 2 > 1, do you get it CLOWN?
These guys are hopeless hahaha.