That's actually a 15% increase
Yup, I'm an idiot and took 750 as the baseline for Atonement instead of 720, I shoulda spotted that anyways. I'm honestly suprised it doesn't decay, very un-SE-ish to give us a flatrate 15% dmg bonus for 1min (potentially 1m30s).
Can see Ancient Circle becoming commonplace in Wyrm/Hydra zergs/nyzul now (assuming ppl do?)
3 Samurais in the mire with AF helm could potentially have 15%dmg increase nearly 50% of the time vs imps too.
I'm almost impressed, I thought it'd suck.