the bats are huge but dragons arenet real so huge bats is not unbelievablein this scene it is fantasy
i dont think there is enough light on the top of the rocks imo , its a huge full moon and it would cast a lot of light and shadow , id also change the shape of the mountain in the backround to look like a mountain for some reason it really doesnt work in my opinion , but you know what they say about opinions
its a really good scene , be great if you get the lighting perfect ,
in the ops last attempt id darken the edge of the rocks that dont get light , they would be pretty dark id think, also the foreground of the dragon would be darker and the shadow would be longer , i think the last scene is too dark if you look at the water below the edge of the rocks its the same tone as the water on the top of the rocks which makes it look a little bland , id make the water on top of the rocks pop , remember its a scene not a photo so it doesnt have to look real just pleasing to the eye which is why i liked the spray lighter as well , it really draws you into the picture