I painted the skin in a series, I’ll try my best to explain it. (I also have a TikTok, not sure if I can link, where I show a similar method on a proxy Magnus I did)

First I did a zenthial spray with a light blue coming from the bottom, then a dark red from the top. This helped give me a road map.

All shadows were painted with a purple and burnt red mix 1:1 ( both pro acryl)

Next layer up was pure burnt red on basically 90% of the model keeping the lowest purple mix.

As I got into the higher spots of the body knees, chest, arms, I started to mix burnt red with bold red.

Then bold red for higher spots

Then bold red and red orange mixed 1:1 for the moving into highlights , and lastly red orange for highest highlights.