Quests with stat/skill level requirements?

[Nephrite]

I've played through the base game and Isles of Ice & Fire with a couple of characters now and I know there's a few quests that require specific stats, like mind magic requirement for the hypnosis quest and persuasion for one in the base game.
My last playthrough I documented the levels of all the trainers I could find and I'm hoping to make a guide in the near future. The one piece I think I'm missing, (other than more research on alchemy ingredients and misc. things) is requirements for quests. If anyone has and is willing to share that info with me I would be very grateful.

Also, how high can you train undead magic in the undead city?

Thanks in advance,

Nephrite
xoxoxo