Stacking Xp..

[Deathpunch]

Yup it definitely stacks

A mob that normally gives 2 xp gave 4 xp with both elixirs on

Deathpunch, unsure though if the modifier is 2x or 2.25x (because it could be 2.25x but rounded down)

Or it is just saving the. 25 until you hit the 5th kill. Then giving you 5xp

-----
Dear STS,
Make a squid buddy pet for AL.
Sincerely, everyone.