Fixing my Small Home Studio-Acoustics Forum-Acoustic Fields Forum

After many years I decided to put some time in the acoustic of my studio, I`m new to acoustic treatment and all I did so far is from what ever I could find and understand from the internet. the Bass Trap help a lot for the low end and I was wandering what else I can do to help my mix/Master translate. So basically take my crapy 12’X 13’X 8′ room out of the equation as much as possible. I understand that my Room will never be GREAT !

What I have so far : Room dimension L13 X W12 X H8 with Wood Walls/ceiling and a Large tick 6 X 8 Carpet on the floor
3X Floor to ceiling Bass Trap made with Rockwool on the Front L&R corners and Back left Corner
1X BassTrap, W24 x H48 x D6 made with Rockwool used as in the 4th corner (Door, no space for a full corner BassTrap)
1X W24 x H48 x D6 Ceiling Cloud
1X W24 x H48 x D6 on the left wall at the 1th reflection point
At This moment I have 2 Skyline Diffusor (748Hz X 4526 Hz) on the Back Wall with a 24 X 48 Foam in the middle

I`m looking to Put 3 Absorber of W24 x H48 x D6 made with Rockwool on the Front Wall behind the monitor,
Place 3 W24 x H48 x D3 with 1 Inch Air Gap at the 1th 2th and 3th reflection on both side walls
Place 2 more W24 x H48 x D6 Ceiling Cloud in line with the 2th and 3th Pad.
Place 2 W24 x H48 x D3 with 1 Inch Air Gap at a angle on both wall to ceiling corner of both side wall and 1 also at the angle on the front and Back wall
Replace the 2 Skyline with a Large square Quadratic Diffusor on the Back Wall.

Probably make 2 more and move my Skyline Diffusor (748Hz X 4526 Hz) to my small live room so I can put 1 in eache corner ceilling.

I doing Primary Mixing but sometime Mastering as a last resort