UO Second Age

I have a pure crafter with magery and inscription. Magery is currently at around 50 and inscription is about the same. I have a couple questions:

Does having higher magery skill give me a better chance to inscribe scrolls. For example, to inscribe an 8th circle spell, I need 80.1 magery as a bare minimum. Would an inscriber have a higher success rate if he/she had 80.1 magery vs 100 magery? I'm asking because I'm trying to see how high I should macro magery. This character never leaves town/my home. Can I macro magery to 80.1 and forget about it?

Yes, 80.1 is sufficient. Your available spells to inscribe are based on your magery; 80.1 = 100.0 in that regard. Your success rate is based on Inscription.

But, I'm unsure if it's "real" or "displayed" skill. Test it out and let us know, if you can inscribe level 8 spells at 80.1 or if you need "real" skill of 80.1. Pretty much every skill works off of displayed skill, but I think there was some uncertainty about magery in the past.

chance to use detect hidden as an aoe is based on real.
skill to join thieves guild is real
skill before you can practice stealth is real
skill before you can practice removetrap is real

This one works off of the displayed skill... I actually tested this out when I was building my scribe.