I use white lily self rising flour, buttermilk, and butter flavored crisco in my biscuits and they are phenomenal. I add a little cornstarch for extra crispiness. But I bet they would be better with original crisco before all the changes.

https://en.wikipedia.org/wiki/Crisco#Changes_in_fat_content

I've tried with butter and low-fat milk and it just wasn't the same.

I use peanut oil for fried chicken. Not sure if it's healthy or not, I just know it's good for frying.