Elixir stacking

[Hellgamer]

So today i noticed i still have the VIP 60 min elixir combo and dont see a better way to use it than farming locked at km3 while getting exp.
The elixir provides 60% exp gain and 30%(+15 from jack= 45%) luck. My question is:

IF i use another exp elixir will i just waste it or the exp will get to (60+25=)85?
I think luck doesnt stack if i can remember but does Xp?

[Ticklish]

I'm not entirely sure, but the moment you open the combo elixir first, you will be unable to open another. I don't know if that is still the case if you do it the other way around. Combo + 7 day xp + perma 15% from adventurer's kit + arlorian egg shell ring do stack, as far as I know.

[Untung]

i think luck elixir from klass and elixir from store dont stack, in fact the new one not even added, yesterday i had about 6 minutes luck elixir (store) then got luck elixir from klass, run km3 and guest what? after 6 minutes all my luck elixir gone. so wait till old elixir end before use new one.

[Tootex]

The xp bonus from the combo elix does stack with the adventurers kit or abaddons xp bonus. You cannot stack another xp elix with the combo elix.

Luck elix will stack with an equipped lepre and arlorian egg shelled ring. Use all 3 for a 50% CHANCE to loot ( luck elix 25%, lepre, 15% and ring 10 ). Luck elixirs will not stack with another luck elixir