Question about runes.

I was wondering, if I buy two runes that give me fire +2, and I place them on two different items, will they stack? I know they say non-stackable, but does that refer to multiple on the same item or altogether?

it refer to all together.

only stackables runes are atunement/vitae.
all others are one by sort by whole equpement.

Basically, with the exception of Vitae and Attunement runes, only one of each type of rune will give you any benefit. Adding a second rune will not give you and attribute bonus, but will give you a health penalty if it's a major/superior rune.

Every rune that says 'not stackable' will NOT stack on everything... and you cant add more than 1 rune to 1 item (so 'same item' is bs).