Why? You don't do significantly more damage in the corner than you do Midscreen with this variation, you have no real way to jail them like Cryo and GM both do, and the ender leaves them standing, with no advantage...
I'm not saying the corner is pointless, it helps, but you'll be doing up to 11% damage less Midscreen per successful string, just to get them to the corner slightly faster, where meterless you do literally 3% less than GM can get per B2 starter, and like 2% more off a low starter. except GM has an untechable knockdown at the end of strings thanks to slide, the option to trade just a little bit off damage for Hard knockdown, and the ability to put up Ice Clones, all 3 excellent things that Cryomancer does not have, and that's not even mentioning shatter combos. The point of Cromancer sacrificing Clones, is that he can out out GM-corner like damage, anywhere on the screen. You want to abuse this as much as you can on every connect.
So my question is, why would you be using Cryomancer if you are just going to end strings with Grandmaster ender, do Grandmaster damage, have less opportunities to apply these strings than Grandmaster, and then get them to the corner where you do Grandmaster damage as well except with absolutely no jail?
Sorry, but this is just a shitty way of playing Cryomancer. It's been said, quite accurately, more than once in this thread that Cryo cares the least about getting them there out of all 3 variations, his damage rises much less than any other variation does, and he has the hardest time keeping them in the corner out of any vaviation of Sub Zero and to be honest, practically any character in the game with a 50/50, considering the standing reset, and the nature of his armour.
There is already less reasons to pick Cryo over GM, but one of the BEST reasons he has, is that while he gets less opportunity to punish, 421+3 means he needs less combo connects to win a round, and that he can take them anywhere on the screen. Ending Cryomancer strings with 123 Slide is just... not good play, 99 times out of 100.
Inb4 the reason you are picking Cryomancer is because online lag, well then sure, I guess you can play him as GM light, but the variation still suffers immensely if you aren't taking those incredible damage buffs Midscreen that he has on other variations. And at the end of the day, that's just an execution problem and doesn't change how this is the wrong way to play Cryo Sub legitimately. If you are going to play Cryo, honestly... Just learn the fucking neutral game lol instead of fighting to avoid it and taking ways around using his footsies and his reset strings to push the to corner, it's a key part of his gameplay and you DO need to end his strings in the reset to capitalise on the variations strengths, otherwise honestly go play Unbreakable or GM lol