Read ID your stacks of scrolls once you have a clear floor to do so on. Aditionally, once I've identified mutation and degeneration, I typically start to quaff ID my potions as well.
Yep! Once you have ID scrolls identified (usually by reading the largest stacks first) use them to identify other scrolls until you find blinking. Blinking should be thought of as a “scroll of lifesaving” because there are so many situations where blinking is the only thing that will save you!
After you have blinking identified (unless you’re identified a ton of scrolls but no potions yet) then go for identifying potions until you find degen and mutation as above!