Ive found it to be a very desirable target for cards such as Sevinnes Reclamation and Sun Titan, since you might need it later if graveyards start to fill up again
Rather, I took the deck in a direction to play a lot of smaller effects to have a continuous stream of card drawing
Ward only triggers when the permanent with ward is targeted by someone other than its controller, so you never have to pay the ward cost on your own cards
Getting Moana on a location with another character and a Vault Door in play can deliver a huge pay-off, but if you're letting the opponent run away with the game while you try to set up all of those pieces, it just isn't worth it
However, she counts as a cost of 3 when singing Songs (another card type in Lorcana), thanks to the Singer 3 keyword
Foundations (Play Booster)