Since I'm working on Game Over images I am unsure which zone I will be doing battle sprites for next. It will either be the desert area or a new side area.
I'm not sure if you were asking how long it takes or how long I make images. It takes about a week of work to get a whole game over image set done though it can take longer as various things come up. Game Over sequences are always 5 images long though some have additional parts that are static changes.