I'm a basic warrior, member of the temple of Arkay, and I just got access to the potion maker.

I'm already seeing Ancient Liches and Vampire Ancients, which can one-shot me. I've got a few magic items that cure paralysis, but I'm still lucky if I can survive an encounter with an Ancient Lich. If I survive, usually it's because they blasted me at close range and killed themselves but not me.

I've got these recipes available:

Chameleon Form

Invisibility

Purification

Resist Fire

Resist Poison

Resist Shock

Shadow Form

Water Breathing

Waterwalking

But I don't quite understand what most of them do. Even things like "resist fire" and such aren't clear to me because I have no idea when I am being attacked by fire/poison/shock.

What potions should I craft lots of and stock up on? And what other must-have potions should I buy whenever I see them available?