worst case scenario for FUT

If NAVI, TH, M8 perform the best possible they can (2-0 map victory, 26-0 round victory) and FUT perform the worst possible (0-2 maps, 0-26 in rounds)

NAVI go 4-1, maps: (9-4), rounds (+49)
TH go 3-2, maps: (7-4), rounds (+39)
FUT go 3-2, maps: (7-5), rounds (+2)
M8 go 3-2, maps: (6-4), rounds (+20)

is 6-4 map advantage better than 7-5 (mathematically with ratios it is better. but in Valorant is it?)

If map difference is the same they go to round difference. Doesn’t matter if it’s 2-2 and 9-9.

That being said after round differential I don’t know the tie breaker I would imagine it’s the most amount of maps won. So opposite of what you said 7-5>6-4

Sadly u are right, all they need to guarantee is 1 map tho which is pretty possible