[Swlug] help with text manipulation

[bascule]

this is a request for help, it's not actually linux related except inasmuch as 
the solution may utilise a linux distro.

i have some json files i wish to edit, their being json files is irrelevant to 
me, i'm not doing json stuff, these files come to me as they are and i need/
wish to futz with them.

they have objects in them such as:

{
"ConnectedObjects" : "",
"ExtraData" : "",
"FormID" : "004366",
"FormID_dec" : 184566630,
"PlotPath01FormID_dec" : 0,
"PlotPath01Plugin" : "",
"PlotPath02FormID_dec" : 0,
"PlotPath02Plugin" : "",
"PlotPath03FormID_dec" : 0,
"PlotPath03Plugin" : "",
"PlotPlanFormID" : "002151",
"PlotPlanFormID_dec" : 385884497,
"PlotPlanPlugin" : "SimSettlements_AddOnPack_Defences_Brae.esp",
"PlotStage" : 0,
"PlotVIPStoryFormID_dec" : 0,
"PlotVIPStoryPlugin" : "",
"RemoveHavok" : 0,
"Scale" : 1.0,
"idx" : 1471,
"isActor" : 0,
"isAssignable" : 1,
"isCreated" : 1,
"isFarmAnimal" : 0,
"isFood" : 0,
"isGenerator" : 0,
"isPowered" : 1,
"isTamedCreature" : 0,
"isTurret" : 0,
"isWater" : 0,
"name" : "Martial Plot - 2 x 2",
"plugin_name" : "SimSettlements.esm",
"posX" : -35624.8515625,
"posY" : 59097.19140625,
"posZ" : 3894.25146484375,
"rotX" : 0.0,
"rotY" : 0.0,
"rotZ" : -188.41806030273437
},

whitespace may have been lost a bit in the copy/paste, 
my files have thousands of such objects, i need to find all objects where all 
of the the keys FormID,posX,posY,posZ,rotX,rotY,rotZ are the same as another 
object's and delete all but one of the 'duplicated' objects regardless of 
whether any other key is the same.  i need to do this for objects in the same 
file, and if possible for objects in two different files.
suggestions so far include learning python, and using jq, which man page i 
have read and yes it seems to be a tool of sufficient power maybe, but i fear 
i lack the chops to work out how to do all the necessary streaming and 
filtering, 
any other suggestions would be useful, 

bascule