Yes sensei copy that.. a genjutsu is a nuisance jutsu and a clone could save me concious and the sacrificing things... it's when naruto learn wind element based w/ kakashi when he do massive clone jutsu or an anbu to being a spies in another village to gather info...Very good. I like the finger references. xD
First: That is the best and main reason. Indeed, imagine if you had four clones in front of you all release different jutsus at you at the exact moment. Dangerous, no?
Second: A very good point that very few people actually think about. Only the Sharingan is able to tell such differences, or normally, people just godmode this in battle.
Third: Another great point with the combos.
You missed two reasons which on one I didn't expect you to know since you haven't learned Genjutsu. A clone could disrupt your chakra flow by touching you, thus releasing you from Genjutsu.
Another reason would be sacrificing a clone for information.
Understand, now?
got it sensei