I agree with thisSharingan genjutsu, yes. Normal genjutsu, prolly not
no one said that the sharringan has the best genjutsu ever, maybe the senju has the best'ssss ones or the others...Sharingan genjutsu is better than normal genjutsu, both of em yes, tsukyomi might resist
But that is only in case of naruto because kyubi wouldnt let ma and pa fuse with himBut for jiraiya,there is always addition of nature chakra.yes, it is disturbance in chakra, but just when the user of sage mode is not moving, becose natural chakra can be absorbed only when you are staying. if the user of sage mode is moving he can't absorb chakra and he can be traped in genjutsu .