Other than the Tunnel Armor battle, the only other time I used Runic was when fighting Kefka in the snowfield at the end of the three scenario part of the game.
I've never been a big blue magic fan, so I never used Strago's Lores except for Aqua Rake in the burning house in Thamasa.
Since I'm not a big blue magic fan, I've never used Relm's Sketch or Control skills.
Morph I will use on the occasional boss fight or when leveling up in the Dinosaur Forest before I can dish out 9999 damage without morphing.
Dancing? Not worth the effort as he seems to trip and fall regularly. But for some reason I always find all of this Dances. xD
So there's a good chunk of them I don't use.