Which all other Modules consultants required at the time of HR BBP Preparation.

Hi Experts,

Can anybody please guide me which all other Module consultants required for SAP HR BBP preparation other than SAP HR consultants.

Scope included OM,PA,TM,E-Rec,ESS/MSS along with Portal,PY.

I dont see any reasons we should go for ABAP & Portal consultant at this point in time.

But please provide me your inputs.