It's nice having a ton of energy ont he field, but if it's stuck on something too weak, or about to die, the energy becomes useless
Today is May Day, which to us means Well, in all honesty, probably the opposite of what Earth Day is about
Surge can also aid in moving and generating Energy for stronger attacks
If you wish to swap out your active Pokmon for one present on your bench, you can retreat it for the required energy cost
Ardenn will expedite how quickly you can get Rograkh equipped since the legendary creature essentially lets you attach all your equipment for free to a chosen creature
And its not like you have to pump mana into it to make it big either, unlike if you had multiple copies of a creature with monstrosity