beating valeria can actually be surprisingly finicky. If you're spending too much on shop boosters she'll never be defeated because the true loose condition is her height dropping to to some value below 200. You and several other competitors are going to have to chip at her repeatedly so that she finally loses most of her height. I strongly recommend using the statue at the temple to boost a number of contestants big enough so that they can regularly beat valeria so that she'll finally be defeated. You don't even need to beat valeria all that many times yourself. It's just you'll need several contestants to constantly bully her so that she'll finally lose most of her height.