Sometimes you've just to try things. Like I wanted to know what the "ironing" setting in #PrusaSlicer does. So I just tried it. And well I'm glad I only read the documentation AFTER I sent it to the printer, as otherwise I probably wouldn't even have tried to use it together with just 30% infill as the documentation says it is for 100%.
However it appears to turn out surprisingly well so far. So lets keep it running and check again.