FF4 Mcu - G20 priority

So I only have enough G20 Bio gear for 2 member of FF4 MCU - who should I gear first? My Invis Womab is 5stars, Mr Fantastic is 4stars, and Franklin is 3 stars.

Im thinking Franklin and IW. Thoughts?

Also, I dont have Prof X yet, so I’m gonna pair the 3 members with Odin and Memphisto - is that the optimal arena combo?