The recipe that has been working very well for me is this:
Enhanced Match Flat Sear Spring - Nickel Plated
11-lb hammer spring
Enhanced Firing Pin Block Spring
(I think GJM pointed this out to me as having learned it from BCL?)
I've got that setup in 2 P30L and it's a great feeling trigger in both. It's fairly inexpensive to get squared away with this setup. No one is going to mistake it for a Langdonized Beretta 92 but much lighter and smoother than factory and very shootable. Every now and again I'm tempted to NP3 the guts and see where that gets me. My P30SK has the FPBS and Sear but I haven't gotten the urge to try to cut a lighter hammer spring down to run in it. Without that it's still smoother but doesn't lighten up nearly as much. The hammer spring is the single biggest factor in weight, the other two have more to do with the "feel".
For a dedicated game gun, I might even try taking the hammer spring down 1 more notch to the 10-lb and see if that'd help more. I haven't tried any trigger return spring mods nor have I tried the Gray Guns short reset part (reset doesn't matter that much to me) but that part is between you and the flat sear spring so if you're going for it, do them together