You can take reference from my own if you want, but I don't think that would be ideal; what I did was a mixture of ULSW 1 and 2 respectively, while yours allures to the former style specifically. What you need to do is to make the second shade a little darker, to give more of a powerful contrast. I made a quick edit so you can see:
Yours on the left, mine on the right. I fixed up the outline colour (it should be more blue as too keep in line with the precedent of the ULSW style) and changed the hand posture a bit. Minor edits on the muscles, t-shirt and hair as well.
You can either:
Use 3 shades. Have the lightest one contrast the second one enough for the flare feeling.
Use 4 shades; 3 of the typical ones (the lightest will be darker) and then the white-ish highlights.