Like Saheeli she has a second ability, where at the end of turn you can spend any amount of energy, to make a vehicle token with power and toughness equal to the energy spent, and crew 2 While Pia Nalaar has potential in more aggressive decks, shes much narrower that Saheeli, and Living Energy is built to work with Saheeli in charge
Cards like artifacts that add any mana act as pseudo copies of Mox Ruby (or any of the old Moxen, really) and big creatures can now get played on turn 1
My Damia, Sage of Stone deck is all about reloading with Damia
Five is a lot of mana, and I dont know that you need to go super big with it, and it isnt easy to do that even if you want to
Surges Bargain is a very modern take on a very old card one with rootes in the old school Gym Heroes expansion