Carraway's Guide to the New Archer: 1.18 and Beyond

[Spider-Dan]

- Blood for Blood adds a flat amount of attack power to your next ability, and WSs and Light Shots receive the same proportionate benefit from that flat increase. So ideally you should use Blood for Blood on every cooldown and simply attach it to your next attack, whatever it happens to be. Its benefit will decrease against high-defense targets.

I disagree with this. This would be sound advice if BfB added a flat amount of damage (e.g. +50 damage to Light Shot is no better than +50 damage to Wide Volley), but it doesn't; like most of these kinds of buffs, BfB affects a multiplier. Therefore, you're better off adding attack power to your hardest-single-hitting attack (usually Wide Volley unless you can't AoE, then probably Bloodletter) rather than a lighter-hitting attack.