Thanks a lot !
Actually, now that some time has passed, there are some elements in the mix that I'd like to change a little bit. I learned some new mixing techniques (M/S mixing/mastering) that could have been useful for this track.

I wasn't really thinking about changing the volume & EQ of the cymbals, but this is mainly because it probably wouldn't do any good if I try to do something about it. My current headphones have little to no highs, meaning I can't control it precisely.

I had the same issue with Dark Nebulae, for which I had to send a "work in progress" version to a friend to know if the cymbals (which had to be in front of the mix, but not too much) were loud enough. On the first version I sent him, while it sounded all good to me, he actually told me he couldn't hear the orchestra because of the cymbals. xD

I might invest in new headphones soon, but since I also have to upgrade my computer (I reached its limits many times lately), I'll have to wait for it.

Thanks again for your review !