Lest anyone be misled, when Peikoff used the rhetorical device of “puffs of meta energy”, he explicitly states that he chose that combination of words because they represent something deliberately undefined. He elsewhere, in the 1976 lectures, explicates that as far as he is concerned the concept “energy” has not been defined in any meaningful way by physicists.
What’s more, I can tell you that the concept “energy” when it was formed originally directly involved conceptualizing entities as causal primaries; and it wasn’t until the Energeticist movement destroyed the concept that we have such foolishness in Physics. Energy is not a substance.
The real question to be answered is, how do you get people who embrace the concept “nonmaterial” to realize there is no way to form that concept using a valid epistemology.
Edit: Or put more broadly, what epistemological rules should guide one when forming concepts of fundamental constituents/unperceivables? How does one talk meaningfully about such existents using concepts from perception and imputing them to the nonperceivable without denying the concept itself?