This is going to be an interesting 'debate'
As far as I can tell having maximum hoard level at level 100 does not appear to affect Dragon Breath damage.
I am looking at Breath of Fire III ability for this (60-100 damage before delay adjustment).
According to an old old post (Tazoon.com i think) each hoard level should add +1 damage to Dragon Breath. Therefore at 100 there should be a +100 damage applied.
Now where does that appear on your character?
Bear in mind that you have to take the damage that BOF does (60-100) and then apply Power, Dragon Breath skill, Casting Delay for delay adjusted damage dealt.
- Dragon Breath skill stays at 1000 base (10 per lvl of DRAG)
- No Passive ability to add +100 damage
- Current Dragon Breath skill only shows the 10% bonus from stats (unless you are using techniques)
- Accurate Breath passive only adds a + to chance to hit
Breath attacks are a magical attack btw
Free free to prove me wrong :P