Hi there!

Just a small question: Does it make any sense to wear a ring that gives you +X to lockpicking if your lockpick skill is already at 100? Same with alchemy and so on.

Thanks for help!

Yes. It's worth it. It makes lockpicking easier and potions you make stronger.

Alchemy, yes. Lockpicking? Not so much.

I'd say it's useful to boost armor, weapon and crafting skills above 100. Others don't yield much benefit. Of course fortifying armor is also useless if you already reached the armor cap.