That's just a bad deal... one pot of Extremely Hallowed Shrine powder + 3 Fancy Picks will get you 900 favor at a shrine. You'd still have 4 uses of the shrine powder to get the last 100 favor (though I'd wager you already have that much, if not a lot more)... so you'd probably be able to get 2 emblems of your own for the cost of a cubimal