I think Xi is harder to get since Xi uses an AR and two A ranks. Delta Plus, FAZZ, EZZ and Z+ A1, and Shield Zook Jegan.
Ksha can be mixed from scratch, except the BR Goog.
I know that feel since I buyfegged mah beloved Xi. Mah poor wallet. ;_;
爆ぜろリアル！ 弾けろシナプス！ BANISHMENT THIS WORLD!
00 Raiser, 00 7S/G, V2AB, Infinite Justice, HWS v, Master Fuunsaiki, God Fuunsaiki, SR Sazabi, Crossbone X1 Kai, X2 Kai, Harute (Final Mission Type) Stargazer, Crossbone X3, Sazabi
Upcoming projects: Arios Ascalon (100% Complete!), Crossbone X1 Skullheart (100% Complete!)
IGN - ホモゲーバスター
Ship 1 - Feoh