"i used map diff as TB, but since SEN and 100T were tied i went to H2H"
I might be wrong, but I think you have to move past H2H completely for any tiebreakers that has 3+ teams. This is because 100T also beat Lev. So with your proposed results, it would go to map diff which would put Lev 1st. then between sen and 100T, if they tie there for map diff, it should move on to round diff right? Because if it reverts back to H2H for their tiebreaker, that seems to discount 100T's win vs Lev which was used to affect the first tie breaker. I'm just guessing at the game theory at this point tho because of that potential skew