If he's not going to debate her then Harris should literally give a 90 minute PowerPoint on project 2025 and what it will do to your pay your healthcare, your environment everything..
Instead, a comparison between Trump's project 2025 vs her goals might be better. Actually look to the future, instead of the doom and gloom of "don't vote for him" would do wonders to get people excited to vote, which helps turnout.
With a picture of the former president on an empty chair emphasizing and underlining his conscious decision not to participate because he knows he can’t debate her on these points.
Would it help excite you and retain your attention if she sprinkled some spicy memes in the powerpoint?
One would think that a Project 2025 fascist government that has no qualms about shooting protesters should be enough to keep your attention about it. But if it takes memes, I'm sure she'd do it.