I had a couple of goes with the first part of KA today. The first time was with 2 tacs, 2 eng and 1 sci. We got swamped and couldn't get past the third or fourth wave. The second time was with 3 sci and 2 eng (2 escorts also) and it was really easy. Sometimes we were waiting at the gate for 20 seconds for the next wave. We used the same tactic as the first time but the difference was we could wipe out borg with ease. One of us had done it before and the other three had never done it.
I see a lot of zone chat requesting Tac dps for this mission but if your team can set up their ships with some decent weapons then is should be pretty straight forward.