1) scrolls of Enchant or Change/Harden material. If I have plenty of spare mirrors then I like to mirror carrots until my perception is about 50.
2) equipment by far
3) I usually wait until I have enough scrolls to change all 4 limbs
4) Depends on what I need. If I still haven't found Mjolak then I'll wish for him.
5) I don't usually wear plate mail, it's too heavy. I prefer very light & strong chain mail.
6) Dual adamantine Mjolak +15