While I know that the whole idea behind experimentation is luck, I’ve lately noticed I’m not discovering any new potions. Theres like 5-6 potions I haven’t discovered yet, and I’ve done about 50-60 basic experimentations and about 15 advanced.
I’d say it’s pretty luck based. I was leveling my alchemy between 80-100 by phial experimenting (which were all basic) and I realized sometimes I hit 4-5 experiments back to back and sometimes it’s failure after failure. Same goes for discovery as well. Advanced discovery will most likely start to give better results (ofcourse still depends on RNG, so can’t say it will be better for sure).