DeathInc were best.
I remember being hit by one of them 30+ clearing waves and a mech attack took out three quarter of my troops all before I could logon
when he lost his mech he ported out but the damage was done to my war city
I remember mailing him saying gee, you could have waited until I was online. His reply was sorry, it would have been more fun huh? next time I promise to wait
unfortunately due to events out of my control I had to quit (would have lost the rematch as he was a heck of a good player - one of DINC's best port hitters)