With my changes for the campaign AIs, the story will feel more as it is supposed to, in my opinion ;) This is no real mod for FA, you only need to replace files of your FA installation. Easy installation and lots of fun changes ^^
To answer the question, no he does not. I watched this game without providing any assistance, and look at the force he's attacking with. At first, the Seraphim is getting very close, but once Fletcher can get within range of the Seraphim expansions bases, he is unstoppable.
Perhaps I should let the seraphim rebuild the bases as well? =)
I'd agree to let the seraphim rebuild. Anyhting to make that mission even more epic.