If they get the Maestrale class frigate from Italy, I can see that being their backbone of the Philippine navy and center their navy around it. Their Hamiltons would be their light frigate or OPV and if were to get the Reliance and Famous cutters from the US Coast Guard, it would be their Corvette fleet as well.The last 1 year or so PN have been negotiating in acquiring the Maestrale/Soldati class of the Italian Navy. Italy plans to retire 7 frigates the next 5 years. If that happens the planned acquisition of 2-3 italian frigates could serve as backbone of the Philippine navy with the WHEC Hamiltons they have been getting from the USCG.
As for the Soldati/Lupo class frigate, I think for the Philippine navy, it would be their light frigate or Corvette