Even click-to-move is subject to the windows becoming misaligned. I know the old rule says "Thou Shalt Not Assume." In multiboxing, there is one assumption you should _always_ make: Thou Shalt Assume Thy Slaves Are Trying To Do Something Thou Didst Not Expect. Start from that assumption and explore common methods to recover from the vast myriad of "oops" conditions.
It really is a different mindset than anything you're used to. The closest analogue is probably being a raid leader, except that you now have to personally intervene on behalf of each raid member.
Once you get your head around it, it's a hell of a lot of fun. Good luck!
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