When you are sitting in the same room with all the signers, it makes sense to have have everyone sign on a tablet (or mobile).
SIGN Butler will guide you through the In-Person signing process indicating who is the next signer to pass the divice to to sign.
The Actionable should use class: cadmus_sign2.Actionable_SignButlerSignNow
this makes sure the signing process starts immediately and it is not required to open a mail or the SIGN Request page.