Yes, of course I'm familiar with Steno ESP. It's very good! The problem I have with Mental Epic is not one of the design of the effect (ie. predicting three thoughts in succession). My issue is with the prop in the first place. A large slate divided into segments doesn't work for me.. If one is to perform a three-phase prediction (Cerberic Routine), one is FAR better off using a common note pad, as per Osterlind's Steno routine, than a prop that appears to come from another planet...
..perhaps the Mental Epic Slate comes from the same planet as the Dove Pan?
Outward sunshine; Inward joy,
Blessings on thee, Barefoot Boy.