Vitality

If BBL TH KC and VIT go 3-6
With the TH vs VIT left it's:
BBL +1 TH +1 VIT 0 KC -2

If TH beats VIT, they are +2/3 so TH make it through
If VIT beats TH 2-0 then VIT makes it through
If VIT beats TH 2-1 then is comes down to a tie between VIT and BBL at +1, so whoever has better round differential with the 4 teams makes it through

There can't be a 6 way tie, only 5 teams can tie on 3
If BBL TH KC VIT and KOI tie on 3-6

BBL +2 VIT +2 TH +1 KC -1 KOI -4

For this situation to happen TH would have had to lose to KOI and beat VIT so the 3-6 would happen which means:

If TH beats VIT 2-0 and lose to KOI 2-1 then it's 2 way tie between BBL and TH on +2 so round differential against the other 4
If TH beats VIT 2-0 and lose to KOI 2-0 then It's BBL +2 TH +1 VIT 0 so BBL make it through
If TH beats VIT 2-1 and lose to KOI either 2-0 or 2-1. Then BBL +2 VIT +1 and TH +1/0 so BBL make it through

I'll do the math

Then yeah