The closest you could come is a clan match.
Some of the SatGNU crew played a teamgame against [F]lame, which resulted in campathon that not even the biggest lamer could back up with proper arguments. It totally scared us away from so-called 'clanmatches'. You might as well play a public game, since it is much the same.
Regarding your invitation for a duel, Puma, since you are so bent on having this this duel, what exactly did you have in mind?
[PS] Against Xonya, I have finished ATCS in 59 seconds, by BZZing her base, she can back this up, only I was named 'poop' and in a bad mood.