It depends on what you're in for, really. Some people are in to test their mettle against other writers, whereas others just want to develop their own stories in front of an audience. The second type would do better with a match like that, and Numbers' idea is a solution to the issues that would plague the first crowd.
I also re-pitch the idea of single-handler tag team signups that only require one RP. The logistics of judging that might be tricky, but sometimes the issue is finding a second person to be on the same page with - something easily fixed if both characters are controlled by the same person. The reason I say "one RP" is because if you create a set of characters specifically to be used as a tag team, it might be hard or unnecessary to stretch it out to two RPs. If the characters are disparate enough (see Ty Burna and El Caidos Dragon, for example) you can get away with two RPs but really I think saying "do double the work to even have a prayer" is a hard sell.
Just some thoughts. I'd be lying if I said I hadn't thought of throwing Dance Party 95 to Creative from time-to-time to use if they need a fun tag team to put people over, but the idea of doing a separate RP for two similar characters that spend the entirety of their time together is kind of ridiculous.
