Like just about everyone else has been saying, She's a superb Supporter if you've got a piece of a bigger Combo in your hand! Still though, A supremely-built deck with plenty of consistency shouldn't have to worry about the small discard with Juniper. Chances are, you'll draw into another copy of the card you discarded! I surely recommend it IRL, though, if you lack enough copies of vital cards your deck needs to be more consistent. Even with a supremely consistent Deck, Bianca could really help if you only have one card in your hand that's a piece of a combo. I think that situation is really rare, though!