in 30 min you need to try get out about 4 pages of quality material-its what I did.
it really is about quality though which is more important but I find it difficult to write without expanding points I'm making and fully explaining them which I think gets you better marks than making concise points.
its hard to know but I finished all the booklet and could have kept going but its about quality too. all my stuff was memorized and quality tho I think, hence the 100ums