RE: decoy or not
If you got that many jakes and the two mature toms are affraid of them , then I would just put two maybe three hen decoys out.
In general just as in deer hunting with the" buck to doe ratio " , same rule applys to turkeys .
If you got more toms and jakes than you do hens , use a hen decoy and vice versa more hens , use jake and bubba strut decoys or a breeding pair decoy.