I didn't have a written transcript of my speech, I just compiled notes/articles on my issue, wrote summaries of them, and formulated my opinion around them.
I had dot points of what I was going to say. But my single palm card that I took for the oral just had 5 headings of what I was talking about. I don't think that approach is for everyone, but if you are able to argue a point without referring to notes, you immediately look alot better (providing you deliver well), and if you are confident enough to do that, it probably means you are well prepared for your speech, and knowledgeable about what you're talking about.
Attached are the notes for my issue, I took out my arguments though, if someone wants to use the topic and resources that's cool, but you should always formulate your own opinion.
Also, some teachers like to see you use the "persuasive techniques" you identify in language analysis. I personally think that is a load of rubbish, but you'll find alot of teachers are formulaic about their marking, so you might want to intentionally throw in some obvious ones.