The Aetherium Crown allows you to have 2 standing stone abilities so....Lover Stone + Warrior/Thief/Mage Stone = 35% Skill training. Figured I would just let anyone who didn't already figure that out know about this.

Yup. It's nice to have. Every new character I make, I rush to that. I don't like using the Ohgma Infinium Glitch but I don't mind grinding.

does it actually stack?

Yes.

My characters are going to do that, but after I get Lycanthropy, and the stones of Barenziah, and Arvak, and Nightingale
Armor (if assassin/theif), and 100 Conjuration+Dead Thrall. Or during. I dont know. Theres so many things that are first
thing... things.

Should stack with other exp bonus's also like from sleeping or smithing with notched pickaxe making it even faster.