yi is very easy to jungle, and he snowballs very hard but the problem with yi is that he has no CC when ganking, depending on CC from the laner. Besides that hes excellent at splitpushing lanes.
Best keep damn good tabs on your redbuff then.
Nasus jungle is done mostly so that people can secure such a gamechanging champion. He can solo dragon at level 6 (assuming you don't get ganked while fighting it) and his lategame is absurd, even if he is jungling and has less Q farm than normal. However, he is better off top so he can more safely farm and you can have a stronger presence in the jungle.
Lee Sin jungle is good, but it's good to learn the meta of jungling before you play him. He's very strong at low level solo queues, but at the same time his skill cap is a bit higher because he has no targetable abilities. You gotta learn how and when to gank, and once you get the hang of his limits (how many tower hits can I take?) you'll get FB basically every game.
Sure, nasus is better top, as you can get more Q stacks. Which means you can build tanky AND have damage at the same time, thats what makes nasus so strong (not to mention tower destruction)
Lee Sin is very strong at all elos lmao.











