I was the same. As an "end game" Wizard, I would play a lot. On random nights where we had already beaten everything, I would help lower level guilds clear some shit just because I wouldn't be bored any loinger. Granted, I was just damage, but I was a LOT of damage.
There was a time early into NToV where we nearly wiped on Vulak. I believe of our entire raid only 2 groups survived. That fight lasted a little over an hour, and I used around 200 peridots (400k damage) in that single battle. Holy shit was that crazy. Everyone that died was SO BORED waiting for the rest of us to wipe, but we pulled it out and won. Pretty awesome shit. I believe the kill was a result of an enchanter, 3 clerics, bard, shaman, warrior, wizard, rogue and a magician. It was a legendary battle. I did so much damage because I didn't need any healers. Just hide from the AE damage, throw a nuke and hide again to continue meditating. I'm not 100% sure, but I believe we regrouped early on after the majority had wiped to maximize the bards benefit on healers. The bard was the best, but the shaman had to maintain malo & turpor, while enchanter had to rebuff KoE mid fight, as well as keeping haste on the rogue, bard and warrior. What a silly long fight. I'm not 100% on the magician, but I believe they were able to hide the entire time, sending out Epic pets for damage (in addition to damage shield buff on the warrior) while doing a chain of mod rods for the healers.