I went on with work but had no time to update, so here there is my news!
Thumbnails + greyscale. Thinkin about the right mood for my character
He's looking very sharp.
No. 1 looks the best, as it gives your champion a larger sense of scale that the other two lack. Makes him feel very god-like, while making the victims look like helpless ants in comparison.
@tj-works thank you so much for your feedback! I tried to merge the 1st and the 3rd mantaining that sense of scale
I was working on tones also to kickstart the painting process
Indecision about colors
Now that I have established the big parts I feel more relaxed, so this is time to push forward the design in the techincal aspects while proceding with the final piece. Not an expert about mechs but okay anyway
I applied color and polished the illustration a bit after some blocking in. I like this color palette, I'll probably push color and contrast forward. I'm going to add more defeated people to make them to feel like an army. Also still working on the composition. I'm leaving the juicy shading for last 
I'm a bit happier than before but not totally satisfied. At least it seems like a proper superior creature (?) I also like it better with exaggerated contrast in colors
Played with the composition a bit because I thought it was too still, now I feel it's more dynamic. I polished it and started shading and playing with colors too. I think purple, blue and gold are good together to convey the sense of lightning.
I hope for some feedbacks at this point!
Updates on painting
Yesterday I woke up Ill of nose inflammation and that was my 100% free day, I'm going to die from stress. 
I'm crying 
