A good deck doesn't sell a terrible story, but a bad deck can ruin a great story. Your primary goal should be to distill your story down to 10 slides max, with as *few words as possible* on each slide. Images, product shots and graphs are all more impactful than words. A good outline is as follows:
3) Market Opportunity
5 & 6) Product Details
7) Traction / Evidence
8) Competitive Differentiation
9) Plan of attack / use of proceeds
10) Contact info / closing point.
Happy to review your deck over a call. I've helped hundreds of Clarity founders with framing their investor presentations.