I'll be around within the next two days to sort out all the entities and species and starting hexes; today, however, is deadline day!
One thing, though. The primary sphere of all faith-based deities should pretty much be Religion by definition. You can have powers that work on Weather, but it's not a sphere that Species can really invest in per se.
Effectively, all gods (unless mystically maintained by some force other than faith) should have Religion as their primary sphere, but they can have whatever domains (fire, slaughter, ponies) they wish for the purposes of the roleplay and how their actions manifest. Spheres are more about the end result than the means of getting there.
As an example, the Demon of Fire mentioned before had a lot of points in Religion, which he used to inspire fear and worship. Physically he did so by burninating things, but because he was burninating them in a showy way designed to inspire faith it counted as a Religious trait. Later down the line, he wants to equip a favoured species' army with burning swords. This is still using fire as his weapon of choice (pun intended), but it would be a Military trait because of the end to which it is being put.
So for Madric, points in Sphere:Religion would be using storms, thunder, visions etc to inspire the faithful, protect them from corruption and achieve special tasks somehow relating to faith, belief and morale. Points in Sphere:Military would be smiting people with a little of the old-fashioned lightning bolts to aid troop strength. Points in Sphere:Population (it could happen!) or Sphere:Economics could be fine weather and good harvests either increasing the chances of successful colonisation of a region or the agricultural wealth of an area. All done with weather, but the ends define the sphere, not the means.