Fairytendo

The early bird catches the worm - You only can use the first 10 Units + Corrin you get. Probably a little... meh The best comes last - You only can use the last 10 Units You get. For example Fates: Chapter 7 1st Felicia, 2nd/3rd Silas/Elise, 4th/5th Effie/Arthur, 6th/7th Odin Niles, 8th Azura, 9th Nyx, 10th Camilla, Beruka and Selena (Unit No 10, 11 and 12) Then You put Felicia and Silas or Elise aside and use your new 10 units. (That Example was for Conquest)

I know it's a little bit late but why don't you use Basara Forrest? You could marry him to Rhajat and then he could go for basara. I simply love Basara Forrest.