Vaclav the Red, the Dragonrider - Finished Base

EDIT: The finished model can be seen HERE.

This is the project (whole WIP can be found HERE) that I shelved in September 2017 when I decided to focus on the Zombie Legion. When that massive project was finally done I could go back and actually make a proper base for this dragon. The problem was, the most important parts of it were two trees that the beast was supposed to be felling down - and I was completely sick of making those for the legion. So, the project waited more and more.

Only about a week and a half ago I moved my ass and actually sculpted the bark for those two trees and set them in the right place - one being broken and another being uprooted. When that was done, the rest of the work went really smoothly. I was supposed to paint my Blood Bowl Bretonnians first, but it was difficult to resist messing with the base. I just kept adding more and more stuff, changing, reposing things, checking the composition, etc. I wanted to create an impression of the dragon emerging from the forest and into the fray.

I did quite a lot of those trees for all the zombie fillers, but this was the first time when I added plastic branches to them. Real thin twigs I used for this purpose earlier are REALLY breakable - and for this project, I wanted to avoid it. They took much more time, but they should endure more too - I hope they'll look okay when painted. I will describe how I did those branches in an upcoming tutorial describing the process of making those trees.

Here you can see the base without the dragon on it.

And here it is with the dragon and Vaclav on it, everything ready to be primed and painted. I would like to say that this was my most elaborate basing project, but the one I made on Nagash was still way more complicated and took MUCH more time...

And now only the painting remains! Only if it was that easy... Currently, I am struggling with choosing the right color scheme. I know that he should keep my usual red-black-white scheme, with the red one being the most prominent. Below you can see some of my rough sketches. From those I am mostly torn between 2 and 5. 2 is a classic look, like a DnD dragon and looks the most natural, but 5 looks more sinister, more vampiric, so to say - and I still need to think what do I like more. Fiery belly on 4 is also an interesting idea, but adding fire to this busy composition would be disrupting in my opinion - not to mention that it suggests, that those belly plates are thin and/or open somehow.

Any ideas or opinions?