Pet Dragons spells too rage-expensive

[Metathron]

I never choose to upgrade one of the dragon's abilities if I'm not able to use it due to excessive rage cost. What's the point, afterall? Or are you at a point where all three choices on level up offer just that? In my last game as a mage, I had no such problems as my dragon leveled up extremely slowly (hardly chose any might skills at all, and no dragon ones).