The options you listed or a standard aluminum insert.On my carbons,that would be 14 grs.You can fine tune almost any weight head by using either 75,100 or 125 gr steel adaptors with the appropriate weight glue on head.The broadhead adaptor has a cavity in the end to which you can add lead shot at the time you glue them up.#6 lead shot weighs 2 grs per pellet.You can get at least 14-15 grs of these in the adaptor/broadhead ferrule.
This kind of setup lets you customize any specific weight you want.I have heads like 235 grs, 295 grs and 318 grs.Each setup has broadheads of that weight,field points and blunts.It is the most versatile way to come up with an exact point weight,especially when a non stock size is needed.