Now that the event is over, it's back to GB1 allday everyday in Kaiser. You will get about 1 hour at night that you can get a blitz room going with the minimum.
The bad thing is, OP Convoy is fun, but they have not fixed it so you get the win or any exp from it.
Blitz is awesome for low level ships, but the exp sucks compared to GB1
GB2 is a much better mode than GB1, but once again GB1 gives more exp.
Notice a trend???
If they fixed the exp/credit gain in the other room modes, we could actually have some variety around here