Well, it is quite a bit nuanced. Below are numbers done by Arrge for the Developer AMA 2 months ago.
** Assuming full charging the arrows (to be able to hit targets past melee range):
3 bodyshots = ~2.5 seconds TTK (~3.25 seconds if bow is not preloaded)
Or best case scenario:
1 headshot + 1 bodyshot = ~1.25 seconds TTK (~2 seconds if bow is not preloaded) **
Not taking into account travel time, because that varies with range.
** Compared to for example Cassidy:
4 bodyshots = 1.5 seconds TTK
Or best case scenario:
2 headshots = ~0.5 seconds TTK **
The comparison here is to illustrate how significant fire rate is in TTK. It doesnât have to be Cass, but they are the numbers I had most readily available.
These numbers of course assume 100% accuracy (which is improbable, considering itâs a projectile), as well as maximum fire rate. Once Hanzo hits a headshot, the target is free to either reposition, employ movement to make it near impossible to hit the 2nd shot, or get healed.
For every shot Hanzo misses, about 1 second is added to the potential TTK (and nobody is going to be sticking around for a 3rd shot from Hanzo).
In comparison, for every shot Cass misses, only 0.25 seconds is added to the potential TTK, therefore his misses matter less. Itâs a question of efficiency. Thatâs the reason why slower firing DPS tend to have higher damage to compensate and vice versa. Hanzo has the added element of being a projectile hero, so the gap further widens, because consistency matters.
Itâs because of these factors that Hanzo canât secure kills effectively without Storm Arrow, which is on too long a cooldown to be a viable combo.