I know there are plenty of cultivation series where we're told the MC is amazing at making cultivations pills, but in almost every single one of them the protagonist's skill in them is either below his cultivation level or at it, making it pretty useless since obviously the as a protagonist you need powerful pills beyond your current level to progress. I'm wondering if there are any series with protagonists who can concoct not just to sell them on the side and make a little profit, or show how he's better than the other younger generation plebs, but ones that are actually good for his cultivation level and even beyond it.
I would say A Will Eternal but his pills mostly have bad effects. They are better than intended but not like how it was intended but it's interesting to read