Hey everyone
I found this addon for people who love using symbiosis. It's a small addon that you can keep nearby on a tool bar and will give you a list of people in the party or raid to show who to cast on to. It will show not only what abilities you get but what they will get as well. It will whisper the player that ability they get. I find it much easier than trying to remember or look up to cast to the right player:
http://www.curse.com/addons/wow/symbiosis