So I actually found a group willing to allow me to try shamaning citadel. It was hit or miss on my dps, depending on the boss but I just write that off as learning the best positioning and movements for myself. Ranging near dead last to top 3 depending on the boss.
I appreciate the feedback, because I often hear smack against shamans. but I used your explanation of what it takes for shamans to be viable in raids. So now it will be just practicing and timing to maximize it. Thank you all!