Could you clarify which mission this is? When I do a search through foundry missions I can't find one labeled "mirror incursion."
There is about as much water on Earth now as there was three billion years ago. But while the amount of water has remained static, the amount of tequila and Triple Sec available for the making of Margaritas has expanded enormously. So you see, we have made progress after all. ~Anonymous
I'm kind of drained of it at the moment, and I will be needing more for some bridge officer training. Also, my fleet and rep projects could use some.
If you needed to grind expertise in the fastest way possible, what would you do?
If you have enough EC get yourself a 1 Hour or 8 Hour XP bonus thingy from the Exchange then spam the Mirror Universe Invasion mission for a hour when its on. (I say 8 hour just in case you do decide to do Patrol Missions and the Borg Invasion missions in Sector space)
You can also replay Episodes too the other night with the MU and a couple of missions i made 200K Expertise easily.