This might belong in the FAQ/Errata thread, but my post is pretty long-winded, so I’m putting it here.
The Flamer has the Damage Effects of Burst, Persistent and Spread, so please tell me if I am calculating Damage correctly.
Linda the Super Mutant is standing in a Zone with 12 unarmoured Garys. She attacks one of the Garys and hits. She rolls 3CD Damage and uses the weapon’s Fire Rate to add 4CD extra to her Damage roll. Let’s say she rolls all 7 Effects.
She does 7 Damage to the first Gary.
Her 7 Spread Effects also hit Gary#1, each Spread Effect hitting a new random location on his body and inflicting half Damage, rounding down. So Gary#1 takes 7+7(3) = 28 Damage on Linda’s Turn.
Then we resolve the 7 Burst Effects. 7 additional Garys in the same Zone can be targeted for an extra hit. Linda looks at her ammo and chooses to hit an additional 4 Garys, spending 4 Flamer Fuel on top of the 5 Flamer Fuel she spent on her initital attack. All 4 additional Garys hit by Burst take the full 7 Damage Linda rolled in the initial attack.
Now we’re left with Persistent to resolve. Linda rolled 7 Effects. So, for the next 7 Rounds, at the end of each of his Turns, only Gary#1 suffers Persistent Damage. This is equal to the weapon’s Damage that was rolled in the initial attack (7), and no new rolls are necessary.
Unless Gary#1 can make an Attribute Test to stop the flames, he will take 7*7 = 49 Persistent Damage. So, ultimately Gary#1 takes 28+49 = 77 Damage and Gary#2-5 each take 7 Damage (all of it Debilitating.)
At least this is my understanding. Effects don’t act on Effects and Modiphius wants us to roll as infrequently as possible?