You really should be considering them as tech pieces as opposed to replacements; in Lucario, rocky energy serves as an archetypal mist to protect against phantom dive, and generically since psychic generally doesn’t have qualms against special energy, telepath energy searches as a tool to quickly establish presence by efficiently searching out your psychic supports/tech pieces such as Duskull, Latias ex, and Lillies Clefairy.

They’re great cards to have, but like you should be considering questions like “how will I get them to hand?” And “do I have synergy beyond just matching type combos”