Bloodsown Circle should fall off as soon as you hit 8 stacks

[Avenheit]

Sometimes? If it has a fixed duration that prevents you from performing the actions in your opener when you intend to perform them, why are you planning an opener that wants to use those actions during that fixed duration? Why aren't you planning your rotation around not being able to use Harvest during those 6s, since it lasts 6s every time?

because one of the optimal rotation openers for reaper is - Shadow of death> Arcane Circle, Soul Slice Tincture, Soul Slice > Plentiful harvest, enshroud