Quote Originally Posted by Techno Email View Post
OK, I just tested this and got additional clarification on how this works. It's a little hard to explain. So, let me correct myself here:

Say the base XP you get from an NPC is 1.

A 4x multiplier will multiply you base by 4: 1 base XP + 3 additional XP, for a total of 4 XP.
A 2x multiplier will multiply your base by 2: 1 base XP + 1 additional XP, for a total of 2 XP.

So, now let's look at how these work together.
A 4x multiplier plus a 2x multiplier will add the benefits of both of these elixir to you base XP: 1 base XP + 3 additional XP + 1 additional XP, for a total of 5 XP.

Now, let's double that for double XP weekend: (1 base XP + 3 additional XP + 1 additional XP) times 2, for a total of 10 XP.

My test validated that double XP is yielding the results described above:
1 kill with no elixir: 2 XP
1 kill with 2x week-long elixir: 4-5 XP
1 kill with 2x week-long elixir and 4x thrasher: 10-11 XP

I don't think I described this functionality properly in the past. Sorry about that!
Thank you for the clarification