Eclectic Learning would, obviously, be the dream of every Warmage, and I would love that.
For the Advanced Learning spell suggestions, I'd probably turn Shelgarn Persistent Blade into Horizikaul's Boom instead.
Cone of Cold is also already be a Warmage spell, and the other closest offensive spell I can think of on the 5th circle would be either Mind Fog or Thalassemia, the latter of which would be useless for Dementlieuse warmages.
I'm not sure just these spells detailed would be worth the bonus feats - it would essentially mean a nerf to Warmage, when I'm not sure that is necessary. But the implementation of Advanced and / or Eclectic Learning could be another possible way of navigating the many extra bonus feats, while not nerfing the class?