Originally Posted by
Plastkin
I'm not sure on the exact spread mechanics because I haven't done more testing (I've been doing math assuming a 1 second spread which matches the initial spread on dummies, despite the tooltip saying 2) but I do know that the spread is done in a way such that every target with the same ignite on it ticks for the same damage. Say you hit target A for 1 million damage with 20% mastery, it gains a 200k Ignite averaged over 9 ticks, so 22222 per tick. When it does spread, the target gains an ignite equal to 200k - [ticks]*22222 but it also inherits the same timer as the parent, meaning they will both fall off at the same time (instead of getting 9 ticks, it may only get 8 or 7). When I hit a dummy in SW and it spreads to 2 dummies, the second affected dummy gets 8 ticks and the third gets 7, which is why I don't know how the 2 second spread mechanic works effectively, so I'm assuming a spread at the cost of 1 tick which at worst case overestimates the value of Ignite on a priority target.
In any case, the way this Ignite works means a Pyro on a priority target with 4 adds up ends up doing this:
Assumptions: 6% PB damage, 3% CHD, 20% Mastery, 60% Crit
Pyro hits main target for EV = 1.06*400%*(2*1.03*0.6 + 0.4) = 693.66%
Ignite value on main target = 138.73%
Ignite value on second target = 138.73% * 8/9 = 123.32%
Ignite value on third and fourth targets = 138.73 * 7/9 = 107.90%
Total expected damage: 1171.51%
Even assuming you don't have Aftershocks or BFS (because almost nobody does atm, we'll get those at 27-30), Flamestrike does:
Flamestrike hits 4 targets each for EV = 180%*(2*1.03*0.6 + 0.4) = 294.48%
Ignite value on all 4 targets = 294.48*0.2 = 58.90%
Total expected damage: 4*(294.48 + 58.9) = 1413.52%
That's whole damage, factoring in Ignite, expected from each Pyro hit vs Flamestrike. 242% is worth more than the value of HU (which is highly valuable when you have force crits, less valuable when you don't, but certainly below 200%). In Combustion you can force 4 FS hits with a DB and a Cinderstorm with LB going off inside Combustion/RoP which is the maximum possible burst AoE damage we can do on 4+ targets (better than just Pyroing a single target), but you still Pyro a single target at however many targets and let LB/PF/Ignite/DB/Cinderstorm cleave if your goal is to kill a priority target (like pulling both packs to the first mini in VoTW), with Cinderstorm in Combustion/RoP above 2 targets if you can hit every target with it.
I'm going to look into exactly when Ignite spreads and ticks then do some math for max Pyro spam, optimal cleave Pyro spam (CiS used more intelligently to get 5 PI for all Pyros and LB explosion), and full AoE on 4+ targets using a simple calculator so people can see exactly what the expected breakdown looks like. This "big Ignite > *" myth is pretty stupid at this point. Even the above math won't convince people that at 4 targets FS > Pyro.