How possible would it be to have your right-click on diamond before placing stickman, then having it so stickman takes the properties of diamond, plus one more? A legit indestructible stickman who can stan on the void edge and never fall out of the 'world'? Who won't ever fall out of the top, bottom, left, or right voids.
Yup. Perhaps, in dmnd mode, it can follow your cursor? Have a toggle option you put in the command center? That might be a "bit" of a stretch, though.