#showtooltip
/targetlasttarget
/cast Soul Swap
/targetlasttarget
You start by dotting your main target up. Your 2nd target will only need 1 press of the macro as the previous target is already dotted. Every time you select a new target from here on out, hit the macro twice, then select a new, undotted target. The last target however requires 1 macro press, and then a manual cast of Soul Swap.
The macro seems to make dotting the dummies in shrine go quite a bit faster for me. If you guys have come up with anything better, do tell!
Edit: FYI, I'm currently maining a Hunter, so if this seems retarded to you, that's the reason. Clearly... :P