Arle C6 or C2 + Xilonen C2R1

Hello, I currently have C2 Arlecchino and wondering if it would be better to wait for her rerun or get Xilonen C2R1 as her C2 seem pretty broken. (currently have ~30k primo but can topup)
My usual team is Arle, Kazuha C0, Yelan C2R1, Bennett, so ig she would be replacing Kazu