Statins do not seem to have a tolerance issue. Are you having trouble controlling your cholesterol on your 10 mg dose?
Atorvastatin is supposed to be one of the two most effective statins in lowing cholesterol so you are on a good one. Bioavailability is how well a med is absorbed and used by the body and bioavailability varies among the statins. It's actually a desired thing. The liver is the target organ so if it is slowed down in the liver (where this happens), it's in the target organ. But honestly, that is hard for me to understand.
However, to answer your question, there IS evidence that there is a boost in effect with the PPI, prilosec and atorvastatin in terms of reduction of cholesterol. https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5033144/ You can copy and paste that article. It's supposed to be fairly modest. This article also talks about increased effect and blood levels of atorvastatin with this combination. https://www.drugs.com/drug-interactions/lipitor-with-prilosec-276-128-1750-1118.html
I would talk to your doctor before doing this though to be on the same page.