I, personally, found my pyro lizard to be really strong come mid to late campaign. I equipped with a wand and shield for the ability to survive on the front line, and With "elemental affinity" and "the pawn", AP costs easily became negligable. Add that to the fact that I was almost pure INT and Pyro for my points
The first turn was often:
Use half of free movement to reposition for firebreath, preferably to hit at least two targets.
Use other half of free movement to walk into the fire you just made.
Fireball for 1 AP
Laser Ray for 2 AP
Now, it never outright kills anyone at-level, but that's okay. What it does do is annihilate all their magic armor and bring them to 75 or 50%, where my support magician can bring in some pain or crowd control.
Yes, it's not as much single target damage as an elf archer using flesh sacrifice into elemental arrowheads on the blood you just made in order to try and annihilate one target, but it's most definitely more damage in a single turn than my ranger ever managed. I'm starting a new campaign (gotta see the stories and personalities of the 3 origins I missed) and I'm definitely going to be using a fire lizard again among the the other new builds I want to try.