Good question @allesia. But it's difficult to give an exact answer because it's also depend on author's habit. In my case, it's better you set the vote delay till 31 minutes. Why ? Because you don't have to share the curator reward with me as author (you will get 100 % curator reward because you vote after 30 minute). The other thing is, I set the boosting bot to arrive here after 45 minutes, so there is enough time for my curators to upvote me before it arrives. Other authors have different habit on how they handle their post. The boosting bot could be come right away soon after their posting. Some other authors do not need boosting bot because they already have a lot of autovoter which is usually arrive after 20 minutes, so in that case maybe it's better you set the vote delay in 19 minutes, because altough you have to share your curator reward with author but you will get a lot of rewards from the upvoters that arrive after your upvote. Because as you know, every vote that comes in after yours raises your curation reward right ?