The way I understand it is even less then half. I could be wrong though.
For example 1st node at 26/26:
0.3s skill recharge
58% WD (let’s say 58 Fire Damage)
162 - 206 Fire Damage
771 Burn damage over 3 seconds
Burn is 771/3 = 257/s
I assume flat is applied every 0.3 seconds so Flat per second would be
(58 + [162 + 206]/2) * 10/3 ~ 807/s
This would mean DoT is a quarter of total DPS from the first node at 100% casting speed.
And only around 1/7 at 200% casting speed???
I’ve checked 2 Mechanics guides (Malawiglenn’s and the new one) but they don’t mention it.
Sorry for offtopic, but i need to clarify FoI stuff.
These calculation are misleading, as you don’t take in account that %crit dmg bonuses are direct multipliers for DoTs and not so much for flat dmg. Capped Intensify provide up to 75% crit dmg and its not so hard to reach 150%+ on FoI .
In real world its nearly impossible to just stay in one place and cast FoI all the time. Any disruption will reduce flat dmg down to zero and will be irrelevant for DoT component.
W/o cast speed and a strong %WD modifier to FoI this sword just won’t cut as FoI weapon.