I have used a decoy, including the Mojo critter, off and on for years. I mainly use it in wide open areas where coyotes can see further and might spot the call. I place my decoy right next to, or underneath my call.
I don't think having more than one is going to be an advantage.
Big mistake I see usually made with decoys is poor stand set ups. Some think that a decoy will fix poor stand set ups. A decoy still needs to be employed with good stand selection and properly working a stand. Just like an electronic call a decoy won't fix everything.
Good luck.
Mo
