Jack and John
Kat and Katherin
Connor and Anthony
Griffin and kijani
Estella and Sue

I think that's it.

So we are having now
Devika and Kyra

Then there still needs to be
Ben
Austin 
Phoebe
Kalinda
Ryan
Matt (?)
Maxine
533

Eight left if you include Matt, of you do being him back Avan.

Maybe Phoebe could fight Maxine? That might be good, if she copies Austin...

EDIT: so we could get as many as we can done, leaving out Ben and Austin that's three four fights