SteemAuto is a good tool, I am not using it at the moment because my Steem Power is too low, so I can't vote too much, I need to measure every vote. But that will change in the future.
About scheduling, I was thinking in using that feature, but I am posting directly on Busy because they upvote my post (if I post there).
My suggestion: Maybe you could do something similar like Busy, give upvotes to people using your website. It's working for me, I am posting there for that reason.