Love the pups. Stick with the cool osl as that works well with the fluff. Get some white in those recesses and the work you blue outwards from that almost like reverse highlighting.
This was done without an airbrush so don't let all those fancy Youtube videos of OSL with an airbrush stop you from using this great effect!
Basecoat the wire on the sword and plasma coils with a few thin coats of Caledor Sky. Layer on a thin coat of Teclis Blue leaving some of the previous color showing. Now layer on some Baharroth Blue in an even smaller area. Repeat in an even smaller area with White Scar. Now glaze the entire area with a thinned layer of Guilliman Blue. Once that is dry do a second heavier glaze of Guilliman Blue in the recesses. When that is dry, drybrush some Teclis Blue around the area you want the glow to be. Take it slow and build it up. Finally, drybrush some White Scar in a smaller are leaving some of the blue from the previous drybrushing showing. Now you have a nice OSL without even needing an airbrush to do it 
Sub out any colors your prefer over the ones i used, just maintain the same tones and it should work out real nice...
