The ShiftstonedEternal Power Calculator is a deck-building tool that visualizes your odds of drawing enough Influence and Power based specifically on the cards found in your deck.
Don't understand how to win with it. Even in Casual it's slow enough, even monotime is faster xD. If u can't hit chain with Sharpshooters, you can't do anything at all. Mono-red aggro or Scycrag is faster.
It's about trying to establish board as early as possible and maintaining damage. Don't be afraid to run with 6 cards or 2 power if you have a dasher in the hand. The best cards in the deck from my experience are Sharpshooter + Warhelm combo, Dasher, and Helena. Eventually you risk running out of steam and you have to go for the kill as soon as possible, elder feather in the market helps a lot with this. Red canyon + warning shot turn 3 is a great way of taking down xultan for example and establishing tempo.
I've been playing around with this a bit today, and I don't have any Shen-Ra, Unbreakable. But I will say that Kira, the Prodigy feels like a great card in this list. Makes the 2 slot a little more crowded, but it makes Finest Hour and especially Helena, Skyguide just bonkers.