creating 8 panels along side and rear of room.

I am new to this forum, but have been reading up on room treatment.  I have a unique situation.  My room (basement) is finished with 4" of insulation between drywall and basement concrete walls.  I am assuming that would help control low end absorption to a point.

On top of that, I am creating (3) acoustic panels with frames made from MDF and filled with 703 unfaced material for the 4" thick panels along the side wall adjacent to my Magnapan 3.7 speakers.  Behind couch will be (5) panels made from MDF that are 6" thick with 4" of 703 and spaced off wall 2" to create a 4" air-gap.  one corner will have trapping not shown yet.

for the 4" panels along side, i want to absorb high frequency and bass, but apparently Magnapans cast a linear sound direction so i am not sure absorbing high frequencies will be too much of an issue here.  I only have 4" because I cannot lose anymore space along that wall.  i have attached a top view of what i want the 4" thick panels to look like.  Will this design be of any benefit?

also attaching shaded image of what listening room will look like with acoustic panels placed around the room. each acoustic panel is 33" wide by 56" long.

i cannot place panels in upper corners nor can i place on ceiling becuase i have canned lighting and no space for a cloud.

Thanks