Only self-tape auditions in my bag, how many/which to send for new auditions?

Hi y'all!

Specific ask for Actors Access but could apply elsewhere.

Relative newbie here, but I have gotten a fair amount of traction in securing some initial auditions, but starting to think what's keeping me from callbacks is either the amount or quality of the tapes I am sending back with the request.

Without a demo reel of on screen experience,

  1. how many self-taped auditions from other roles should I send?
  2. how do I decide which to send if only 1-2? Something that indicates range, where I was most comfortable, only the latest, etc.?

Thank you!!

Please note: this is for the "cold" application to various breakdowns - not for auditions that I've been invited to submit