Cibé is used in Connacht as well (in cibé ar bith, etc.) but I think pé is more common in both Munster and Connacht.

"Cibé is gá" might be okay. I don't know for sure. However, I get the feeling it means more "Whoever/whichever is required".

So, unless others strongly prefer "Cibé is gá", I think Pé rud is gá is safer and already has three in agreement.

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Múinteoir Gaeilge - Irish Teacher
My "specialty" is Connemara Irish, particularly Cois Fhairrge dialect, but I can also speak Ulster and Munster Irish with native-level pronunciation.
Is fearr Gaeilge ḃriste ná Béarla cliste, cinnte, aċ i ḃfad níos fearr aríst í Gaeilge ḃinn ḃeo na nGaeltaċtaí.
Gaeilge Chonnacht (GC), go háraid Gaeilge Chois Fhairrge (GCF), Gaeilic Uladh (GU), Gaelainn na Mumhan (GM), agus Gaeilge an Chaighdeáin Oifigiúil (CO).