As a tip, try to remove frames where nothing changes, I always find when making gifs from anime, there are 2-4 sets of frames at a time where nothing changes.
This causes 2 problems:
1) it results in the gif being larger than it needs to be
2) it also cause the movement of the gif to feel slow and stuttery
I always go through my gif and take out unnecessary frames and so that the gif plays faster and smoother.