adventurer's kit and abaddon XP stacks?

[Raselph]

Hi ,

ever since i visited the thread "who is courage the lion?" i had a doubt on th XP stacks...since th adventurer's kit will give you PERMANENT 15% XP does abaddon's 10% xP stack together as 25%?? i'm just curios...so i can lvl up my toons...

[Pillowhead]

Probably.