Lets start with Mach10. Since its a ranged touch attack, and it has unlimited uses per day(so far), I feel the damage should be a little more spread. Maybe a d12, and you get 1 more die every 3 levels instead of the 2d6 every 4 levels. You gain higher max damage faster, but the variation in damage will be greater. Its easier to hit the max damage on 2d6's than on a d12. Lets do a quick calculation:
Mach 10 - 2d6 + cha mod = 12 damage + 4 more damage from charisma (if you min max) at level 1, with a minimum of 6 damage (if you min max).
Black Mage's Fire spell - 1d6 + casting mod + 1 per level = 11 possible damage at level 1(if you min max), with a minimum of 6 (if you min max) (this is without the increased damage black magery) Most of the black mages damaging spells also have a saving throw to half the damage.
So right away you are fairly capable of competing with/out damaging a black mage at level 1, and at more than double the distance.
Both are ranged touch attacks so both are fairly easy to land a hit with, but 60ft at first level seems very strong for a touch attack, especially one you can use EVERY round.
So I feel it should be something like this: 1d12 + 1d12 every 3 levels. Dex Save DC 10 + Cha mod + 1/2 the sonamancer's level to halve the damage. Ranged touch attack 25 ft + 5 feet every 3 levels. This way the range increases at a steady pace, and the damage, while having a higher average, also has a wider variation.
At 20th Level you'll have 7d12 + cha mod + weapon damage at range 120ft. Which is still really strong.
The 4th level ability is neat, but still strong, hence the higher damage variation for mach 10.
Overall, I think the metamagic feats are overkill, not needed, especially since you already get bonus weapon damage. Replace them with talents or fighter bonus feats in my opinion. However, if the Sonamancer ends up having spells, I can see this working.
And finally, I feel the 8th level ability should not deal damage. I think instead of damage, it should be more like a feint, where the target that missed loses its Dex bonus to AC on your next attack.
Now lets talk weapon proficiencies. Simple weapons, and 2 or 3 melee martial weapons, like Scythe, Scimitar, or War Hammer. Why? Because the image I'm getting when i think about this class, fits these weapons.
Again this is all based on my opinion, and whether or not you decide to take any of my advice, I'm still interested in seeing where this is going.
@dairius - Sonamancery? Or perhaps Sonic Masteries?
Mach 10 - 2d6 + cha mod = 12 damage + 4 more damage from charisma (if you min max) at level 1, with a minimum of 6 damage (if you min max).
Black Mage's Fire spell - 1d6 + casting mod + 1 per level = 11 possible damage at level 1(if you min max), with a minimum of 6 (if you min max) (this is without the increased damage black magery) Most of the black mages damaging spells also have a saving throw to half the damage.
So right away you are fairly capable of competing with/out damaging a black mage at level 1, and at more than double the distance.
Both are ranged touch attacks so both are fairly easy to land a hit with, but 60ft at first level seems very strong for a touch attack, especially one you can use EVERY round.
So I feel it should be something like this: 1d12 + 1d12 every 3 levels. Dex Save DC 10 + Cha mod + 1/2 the sonamancer's level to halve the damage. Ranged touch attack 25 ft + 5 feet every 3 levels. This way the range increases at a steady pace, and the damage, while having a higher average, also has a wider variation.
At 20th Level you'll have 7d12 + cha mod + weapon damage at range 120ft. Which is still really strong.
The 4th level ability is neat, but still strong, hence the higher damage variation for mach 10.
Overall, I think the metamagic feats are overkill, not needed, especially since you already get bonus weapon damage. Replace them with talents or fighter bonus feats in my opinion. However, if the Sonamancer ends up having spells, I can see this working.
And finally, I feel the 8th level ability should not deal damage. I think instead of damage, it should be more like a feint, where the target that missed loses its Dex bonus to AC on your next attack.
Now lets talk weapon proficiencies. Simple weapons, and 2 or 3 melee martial weapons, like Scythe, Scimitar, or War Hammer. Why? Because the image I'm getting when i think about this class, fits these weapons.
Again this is all based on my opinion, and whether or not you decide to take any of my advice, I'm still interested in seeing where this is going.
@dairius - Sonamancery? Or perhaps Sonic Masteries?