1246 with the big win today. Can they turn this around?

It's possible, they finished 3-6 in the Spring Season group phase so they could still makethe playoffs and pull off another monster run that surprises everyone.

I looked into what it would take for them to overtake MT1 and it's pretty rough.

Current Rankings:
MT1: 2-3-0 / 7-6-1
1246: 1-5-0 / 5-10-2

I think MT1 will go 3-3 in their last 6, as they have an equal number of games against teams both above and below them. To overtake them 1246 will have to go 5-0, map scores come into play if MT1 go 4-2 and they're eliminated if MT1 go 5-1 or better.

Best case rankings:
MT1: 5-6-0
1246: 6-5-0

They can do it, but they have a very uphill battle ahead, right now I'm not convinced they can pull it off again.