This isn't because the cards aren't good, but it's rather an issue of the cards being reasonable individually as opposed to relying on a core Energy strategy
The thing is, nearly all the effects that put stun counters on creatures require you to tap the creature first
Usually by the time you have access to eight mana, there will be more than one response to your Absolute statement, so look for openings and be ready
The choice of what the best cards in a format are is obviously always somewhat subjective, and it will come down to what a given player likes to play
(2020-11-10) You can choose two commanders with partner that are the same color or colors
All five are quite grandiose in scale, art-wise, so Id imagine these are expensive cards all around