The games for PRX matters not at all.
They can lose all their upcoming matches and they will still make Champs.
They have 15 points right now (tied with Gen.G as topping the groups gave them additional +1pt), but they have a better H2H record against Gen.G so they are counted first in points (winning against ZETA would put them at 16 points, but doesn’t matter really).
Now it’s just a matter of whether they troll Gen.G by playing shit (Gen.G would have to make top 3 themselves) or not.
PRX, EDG & FPX are confirmed for CHAMPS 100% (purely due to their points as safety net).
(EDG & FPX are both in uppers but different bracket, so even if both of them loses their first game, they will face each other in the lower bracket and 1 of them would be guaranteed top 3 while the other would go through points so they are both 100% in Champs)