Maybe I was a bad player, but I didn't seem to have problem with any of the previous missions as well as the Klingon and Romulan campaigns...
Basically, this was the mission where you need to assault the Tal'Shair forward base with a bunch of other ships (Excelsior, 2 Norways, Defiant, etc.) There are 2 Romulan Hawks and at least one Talon I think (2 CAs and 1 DD?) plus the base with 4 defense platforms.
What usually happens is some of the ships went straight for the defense platforms, and got slaughtered (those defense platforms pack heavy disruptors!), while I got after the ships. With a bit of maneuver I can take out the lighter ships, then Arai's Warbird appears, and I can't seem to kill her or the cruisers. By this time all the rest of friendlies got slaughtered by the defense platforms and the base, while I play tag with the ships.
Once I managed to last long enough to take out ALL the ships (and forced Arai to withdraw), but I had to use a trick setup: a Sovreign with mostly rear-facing weapons, and get them to chase me. Then I'm left with 4 intact defense platforms and a base, and there's no way I can crack that by myself. WIth marines, I took out 2 of the defense platforms, but got crippled in the process.
I thought I used everything. I used mines, I used shuttles, I use anchor on the ships, I ordered wingmen to go after same target... So what's the trick? Should I follow right after the friendlies in attacking the base? Are there any tricks in attacking defense platforms?