ha the first time i played the last mission the core defender jacked all my mini bases from where he is to my main base. when i figured he was destroying all of those i made a back up base and destroyed the bridge to it. although i ended up not needing it because i destroyed it with air attacks and a lot of other miscellaneous units i had lying about.
but from then on i just pwned him from air as soon as he was released. id just have LOTS of air units ready to in and a good number of ground units for back up.
lol @daTS iv finished all of the TS/FS campaigns at least twice because they really arent that hard. i liked some of campaign ideas and maps in FS though. if you really want a challenge go get the Covert Operations for TD some of those missions were incredibly hard. (although they didnt take me long to figure out. probably my favorite was the Nod one where you have a base but your still screwed because your base is surrounded by big forces of GDI units and GDI keeps air striking you every so often.)
so yeah just use lots of disrupters and if that doesnt work carpet bomb the tin can with banshees or orca bombers