Oof. I'm overwhelmed. I don't know why, but when I listen to your work, I always have a kind of movie playing in my head. That song that you both made is epic. I really liked the strong part at 2:50, but the whole song sounds and is epic, no exaggeration. I also liked the ending after the stronger part. It was a great way to end the song after that final climax.
Your song is fully worthy of his score and my 5/5. I seriously hope that you'll "Step" forward and do some even better songs with Echo, you are both Epic musicians. (With a capital "E")
(English isn't my native language, so don't mind if I did a few grammar mistakes or anything like that.)
Keep it up! ^^