I've noticed myself splashing in Leadership, whether through adding one leadership hero to 2 from another sphere or through songs, often. I like the usual suspects, Steward of Gondor, Faramir, Sneak Attack,etc. This leads me to wonder: If you're looking to add 4-6 different cards (so 12-18 ish total cards going into the deck) to splash one sphere into a deck, what cards would you choose for each sphere?