yeah. imagine a game where you have a boss rush of these 7 or better yet a game where its a typical touhou game but at the end of each stage was one of these 6 and Yukari was the EX-Stage boss making 7. 6 stages of EX-bosses and an Extra extra at the end hhaha. man that would be killer. I'd totally play that game. I can do Flan, Mokou, Koishi no problem. Nue is easy if i focus enough but Suwako and Ran may give me a run for the money and Yukari...well some of yukari's attacks were easier than Ran's but she's kinda manageable haha.
On the other hand, she might be to busy to do stuff like this. She's the only Ex-boss who actually have a job or any thing to do. Well except Ran, but she's following Yukari by orders so that dosn't count.