[Autumn]

Realistically, with the 3 traits associated to the skill, you can think of the SAN + character LV scaling as the "SWA" filler for the skill, Which would be roughly 90-110 SWA depending on if you're really pumped on SAN or not, which leaves you looking at the fire ATK more realistically for the skill. Lets say we want to bump up Fire Breath to be a truly magnificent beast for it's, quite frankly, insane FP cost. Granted a lot of this FP cost is mitigated by the existence of Channel Magic as well.

Currently Fire Breath scales in the following way:

Character LV/2 + Scaled SAN, increased by 100% of your Fire ATK under Channel Destruction. (boosted further by an additional 20% of your fire ATK with lvl 5 Blessing of Hyatt)

With traits it becomes:

Character LV + Scaled SAN, increased by 100% Fire ATK under Channel Destruction, increased further to 150% fire ATK while under Channel Magic. (boosted further by an additional 20% of your fire ATK with lvl 5 Blessing of Hyatt)

We can equate the momentum cost of CD CM to invocations and accomodate for that, and using roughly 100 SWA and 150-170% Fire ATK does seem much too low for an invocation of any kind, so I think bumping up the theoretical SWA and fire ATK scaling slightly will make up for this, the goal being to aim for a max rank invocation without the need for the blessing of Hyatt.

Therefore I propose that the SAN scaling of the skill be increased to 150% instead of 100%, giving Fire Breath a bit more oomph itself when built for (looking at roughly , and also the fire ATK scaling of having both Channel Destruction and Magic active be increased to 80% (from 50%) extra Fire ATK scaling, this should give the Hyattr a huge AoE cone that deals roughly 280-300 base damage, with 40-50 SAN and 90 fire ATK, a very generous investment of both SAN and Fire ATK.