If you're going to go with Macragge blue I would use it very sparingly. With Crimson Fists, the idea is to keep the blue very, very dark but add a few edge highlights. So you could go with a few edges picked out in Ice blue or one of the other light blue shades, with a tiny white highlight on the very edge of that, and you'd get just enough shiny blue highlight to make the edges pop.
For the red, highlight with a nice bright red like Blood Red or Evil Sunz Scarlet, but use it sparingly around the edges for just the right feel.
And if nothing else, try whatever you were originally thinking, but do it on a single test model first