It's arguable whether it's better for the coefficient for Rangers to make the Champions League or drop to Europa.
They and Celtic get four bonus points each for the coefficient if they're in the CL group stage. You don't get any bonus points for being in the Europa League.
So Rangers would need to win two games (or one win and two draws say) in the Europa League just to equal those bonus points. They'd be in pot one, but they could still end up with a group of Real Betis, Brighton and Toulouse which they could easily finish bottom of with no wins.
In truth, because there's no bonus points on offer in the Europa or Conference groups, you could argue it's better for the coefficient if Aberdeen lose to Hacken because we're more likely to win more points in the Conference.
That all said, we should want Rangers to beat PSV. Not for the coefficient, but because if we're both in the Europa League then - as I explained earlier in the thread - it'll cost Aberdeen €1.5m in having to share the TV money with them.