You get your leadership higher by buying the War Avatar Catalysts, I believe their called, and turning them into the guy across from the Sacred Forge by the tree in Primal World, I'm not sure his name. 360 Catalysts total gets you full leadership. For Nuema you have to buy the Nuema chests from boutique or do the primal dailies to get nuema chests. There are 6 Nuemas. One for each card type. Destroyer, Battle, etc. There are 5 tiers to each nuema. With each tier you get more attributes. It takes 26 nuemas of one type to get a full 5th tier.