So I'm working on my force alt atm and I've avoided using any of the exp/tri boosters on my main so they could be saved for alt leveling. If you have premium do none of them stack? I've tried using 100% tri-boost but It won't let me use them due to the 50% buff i have from premium. Any clarification on this would be appreciated.
TL;DR: The only 2 buffs the game is letting me use is the 50% tri-boost and the 7% from the alliance tree, none of the other exp/tri boosters have any effect if i try to use them.