I'm curious about the team compo on both side. Given a 6 level/7k power difference, for the weaker team to be able to do any significant damage on just t1 and t2, which is usually when kurotsuchi guarantee the first move if even that, to lead to a victory is difficult. I can imagine a similar power match up, the 1-2 turn of going first might allow him to kill a char or two off and thus break your team, leading to win, but with that power difference and the chakra limit of t1/t2...

There aren't any high power player using her on my server, highest one is about the same as the one you describe while my power is similar to yours, I just face tank the damage on t1/t2 and steam roll him after. He can't even kill one of my char during t1/t2. No, I'm not earth, I'm wind and I'm not using shield of any sort.

Usually that doesn't really help, because if the slow is used right, by the time you can dance, the debuff is due to expire anyway. Prompt mystery is delayed just like everything else. This is due to the fact that you can't dance on turn 1.

A prompt cleanse on turn 1 would be different, because even if slow is cast late on turn 1 to avoid regular attack based cleanse, you can clean it off after before entering t2. and if it's cast early on t1, you can cleanse after they do their turn 1, which is usually nothing much considering they burned their chakra on the slow. And if they wait for t2, then they are stuck in a init race anyway, not that different from a regular round. prompt cleanse on turn 1 is rare thou, "best" one is regular sakura and she is... well.... Thou some char does carry a passive cleanse before every action AND a prompt t1 skill, so they can at least free up one char, thou not of your choice.

An active cc on turn 1 could also force them to use it early or be cc'ed and never get to use it, and that opens up the option of having your regular attack based cleanse to proc and remove it in t1, after they do their thing (which is, again, nothing much)

most heal/cleanse thou does not work by themselves, at least not sufficiently, only allowing one or two ninja to be cleansed in time if that, and you don't get to pick which.