Is Xilonen her bis ?

I've heard that Arlecchino's best team is Bennett Citlali Xilonen. But thinking about it, Citlali already use cinder city so Xilonen has to use another weaker set. Wouldn't Kazuha (or Sucrose even) be better since they have access to all of their normal buffs ? Also, is petra reliable, or is it a pain to get the cristalize with Xilonen ?