RFR is probably the easiest monster spam we currently have with a ton of enemies if you complete it. The only issue is if your making random games then randoms will end up dying (from big boom traps or megid etc). And without scapes you fail (technically you warp up to counter but if you don't...
There are 3 options in the launcher via windowed Mode
If you select Virtual Fullscreen you will have Alt-Tabbing allowed.
Fullscreen does not (It's the classic version).
Also if you want to use it on another monitor screen (not your automatic main screen) you can use windowed and move the...
No idea where you got 22 from unless you are making 2x Heart of Flamberge coloured Green (in which case yes that is correct).
You start at blue with HoF so need 11x to get back round to Green (since there are 12 total colours).
edit: I agree that it sucks you have to use so many PF (for all 4...