The colors are much better, well done, you are getting there
If i may, I'd still use another color for the plastron of the Jailer (instead of your purple red, maybe black/grey - not too dark) because purple and red are too close and touch each other on your CAS, which is something you should avoid.
As a general rule, if you want to discern the diff pieces of equipement that are in contact with each other, choose a different color rangek, so it clearly adds clarity to your whole design.
Knowing this, you can either go for a trichromic color range with suitable color mix (ie. red, white, black is done to death but works well) or mix a wider palette with different pattern for a richer end-result, but it requires a greater eye for colors and patterns, so practice and remember that you can pick out great color and color arrangements from some of the 1P/2P designs of the standard cast.
Create a custom 1P/2P, take note of the colors you like and with which other colors they work well on a design you like and try to reproduce it on your own build.
You can also use the pattern basic colors to great effect, or mess with them to create wholly new patterns...a great example is the golden snake pattern you used (in black) on some of your stuff, it can be rotated and shrunk / increased to create various things such as a padded leather armor, a straw hat, or a scale mail...(only talking about techs i used on some of my CAS, but there are other patterns than are incredibly flexible and useful, even with their original coloring)
Recoloring actual 1P/2P is an interesting yet difficult exercise which will give show you what is wrong or right.
I'll PM you a link for reference...
A last advice (that is how i do it) would be (after you have worked the skin/face color, paint, stickers) :
Assemble all parts of your CAS (including ExEq) and paint it all white.
Doing so you see all the little details and distinct parts of your build and it looks a bit like an unpainted tin figurine, if you see what i mean.
Then you can paint it like you would IRL :)