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.
Still easy to get to Masters with the Endra nerf. Your 2 power slot was overflowing already. I'm going to experiment with replacing her to see how high in master I can go.
Endra is good enough on her own that she doesn't really need synergy (although the weapons do synergize, can activate her mastery with a single attack). A 2/2 for ~1 that pings for 1-4 is usually useful, especially in Expedition which has a lot of 1 health units. Also, your opponents don't necessarily know there's no big Endra combo here, currently Endra inspires enough fear that playing her might bring out some premium removal (like Edict of Kodosh or Cremate) that might otherwise eat a unit you care more about.