I've tried it all man. CRTH2 antagonists in particular (OC,Seti, TM) only work in 2/3rds of the population due to genetics. We see this in smaller percentage for Finasteride also. For most people, dutasteride+RU should be enough. People in the hair loss community will say that those two together will halt Androgenetic Alopecia. But it completely depends on the individuals response to these drugs. I'm guessing a lot of it is genetic and comes down to phenotype variations, as we can see with studies on Finasteride and Setipiprant. dutasteride may also be a stronger 5AR inhibitor but it will also work for more genetic variations. But there will still be a select few that don't respond at all - to any hairloss drug.
Of course, you can go down the spironolactone/CypA road. Maybe even topical Enzalutamide rather than RU. But that's the point where you are pretty much guaranteed feminizing/anti-androgen side effects. Then you truly have to question whether you value your hair above your health.
Hey Dench, do you have a source about CRTH2 antagonist and finasteride only working in a certain amount of the population due to genetics? Might explain a lot for my situation