Is there a way to use Celica and Katarina on the same team?

Unfortunately the high blue mage meta makes runnin double red very much detrimental to te intention of deathless arena runs. I personally wouldn't recommend using both at once for abnormal arena team on attack nor defense because getting both killed will be too easy in all honesty unless perhaps you have a really well built fae with lightning breath and triangle adept to deal with the blue mages herself maybe?

If so then you could likely do as you pleased with your reds since res mages slaughter hector and ryouma

I think you don't do too bad if you just build them identical, considering we have Arena Assault coming in two days.

In an offense team, you can make 2 red mages work but you'll be needing a strong green and blue unit like julia and camus. A defense team is different though

Hey HeiTCB16 ! Aren't you the guy who wanted to do a triple color raven team ?

I think all you need to kill horse emblems is a good green magic tank (titania, Fae, or anything with TA, Gem weapon) and a reliable blue unit to take care of xander/eldigan, so any magic damage, Nowi is good since she can tank as well, but Linde, S!Corrin, Mae, B!Shida or whatever that hits on Res.