If you do it right this will look really nice in a render all together, so when i played with this stuff for very little trying to do something similar to a design i did long time ago (helspont) i did flames.
So i can appreciate what you are doing here, hope it works out i really like the look of the hand progress, i feel like you'll get it eventually, but yea testing is what takes the longest in the rendering game. Also maybe if you aren't already try lowest setting possible, (its what i started to do so that the renderings don't take all day) (my machine and back then it was a while for my little bit) In the end i just rendered the smoke/fire and composited it over the final model, it worked out well enough for me.
Good luck with it.
And i'll toss a bone and idea towards the armor, hurricane debris .