Are minors considered 'too minor' to act as attack spells?
Not at all. In the original examples I listed there was a fire based attack minor. They would just be small scope / single target / low duration / etc.
I seem to be having a bit of trouble processing how powers would manifest for the Might characters. Powers in general to me always make me think of something above normal, to magical levels, and so I'm having trouble pairing the two up. Is Might something that's really not even coming into play in the powers? Is a human with 12 Might (besides looking like Ahnold) great in a powerless match but their 'Major' is little more than throwing a LARP nerf 'fireball' at someone?
First correction, both Aethyr & Might are rated on a scale 1-10... Just a little note.
Second the powers as relating to might characters are more like magically infused techniques. So the basic idea is that a might based ability is that a mage might shoot a fireball, but a 'fighter' might have an explosive strike. A mage might have a blizzard rain, an 'archer' might make one arrow become a rain of many. The general idea is that might does not represent magical damage, but that techniques have a higher base damage then spells - might characters also have the benefit of doing things with themselves / weapons / etc. I think this may help... Ditch the idea of 'caster levels', cause I bet that's where your brain is stuck.
In D&D a fireball cast from Joe does 3d6, which hurts but when compared to Omegus the Archmagus
who does 15d6 with his fireball, because he's got the caster levels to support it. Assuming their both level 15, one of those fireballs does something, the other gets eaten by DR.
In Dragonsong the fireball is more like 100 damage +1d10/Aethyr. The character with an Aethyr of 5 vrs the character with an Aethyr of 6 have very little difference.. .But a character with an Aethyr of 2 vs a character with an Aethyr of 9 are going to see some mileage variance.
Might affects weapon damage, which affects technique damage (assumably) but not the damage of the spell itself - but it's assumed that techniques typically have a higher base damage anyway. Further Might characters have the benefit of being able to successfully do things in situations when magic has been drained / etc.
There is no system and if you try to tear it apart you're going to run into issues. As mentioned in the info post: Please note for the purposes of balance we will be working to ensure martially focused characters are not entirely out shined by magically focused ones
. If you want a martial focused character but dump everything into Aethyr to have uber spells... You're going to be upset when Tiny Tim of the Squires
beats your face in with his wooden training sword.