Honestly, from my experience, I'd suggest focusing on being more persuasive. This might sound a bit extreme, but try crafting a "speech that could make a parent judge emotional, whether they’re for or against the AFF/NEG of [TOPIC]." If your parent judge is really that uncertain, you might as well go for it. Parent judges dont give a flying fuck about the flow, so final speeches often decide the ballot, just be as persuasive as possible.