What gets hit first? Guardian or Life Sheath?

If I have both enchants on me at the same time, and some dude smacks me in the face with a hammer, does the damage get "blocked" by guardian first or does it get absorbed by sheath first?

im pretty sure Blocks come first mate. For Example using Vengeful was Khanei and then say Defensive Stance, Vengeful will mostly suck as Defensive is blocking pretty much everything (i mean 75% block is designed to block almost everything) and seeing as Life Sheath blocks how much damage you would take and in this case a block = no damage so therefore you keep your Life Sheath unless you actually take damage from something.

Wouldn't it depend on that order you put them on?

no not at all, preventing damage via block or evade comes over anything else you see, you can't negate damage from Life Sheath if it was going to be blocked afterall. again with Vengeful Was Khanei you can't deal damage back to the person if its blocked. The Game decides whether it will be a block or if it won't be and if the game decides its a block, its a block so therefore you take 0 damage and Life Sheath is unaffected

Hex Removal depends on the order they were put on.

Yep, if you block or evade it first, there is no damage to be absorbed.