guys regular exp elixirs add to each other but they all multiply with 2x exp weekend.

Example: you have a 3x combo from blessing, a 4x thrasher, and you have 2x weekend long exp elixir. That will give you 9x exp per kill here is the reason: 3+4+2=9 but then there is the double exp weekend now you can multiply that 9x with 2x and you will receive 18 exp per kill.

If you are getting 18 exp per kill it will only take a hr or two to get from 75-76 in mega maze