Really nice work on scimitar weaponery and character clothing
Even if I really like your composition...maybe (I say maybe ) there is too much stuff going on here.
Try to recrop a little more your canvas.
A small paintover I just did (but you sure could improve even more if you want - and if you have the time) - click on it for a better view.
Would be (maybe) nice to see the giant guy helping the hero making the big jump ?
The wizard on the upper left corner...need a better pose for instance : raising his hands in the air summoning something or bound with lighting above his head ?
Oh and the skeleton head (bottom right corner)...would be better on the back side.
Just some ideas like that, and I always repeat it but just suggestions, take it or not, whatever; I just like to help a little
But overall the composition could be very nice.
Just try to focus (direction, lines, characters, etc) -> directly to the hero to make him (very) important.
If you need more information on my paintover tell me !
Good luck (and sorry for the big story).