Quoting Gringat the Repugnant
I say use the three with the most useful parts and leave the other. Maybe put the two girls in since their designs are similar and would let you have a bit of symmetry in the Kaita.
That's a good point,the girls also are most custom,so they would be the most useful.I guess I just need to decide between Renedox and Grift now.Both come in about the same in usefull parts.Maybe Renedox,since both girls have plenty of black and silver,it would refine the color scheme.