Would a user macro with /macroicon <wyrmwave> be helpful to see if it's been used? I had to do make something like that and place it next to my character on another job earlier.
I don't play summoner and i'm not sure why you need to watch for wyrmwaves. Ruin IV procs maybe? -I really wanna see if the game doesn't let you do this for some reason, but it's down for maintenance atm.