100-200 pages on a very unique niche like "Diablo II Cheat Codes & Tips & Tricks" ... if you make 100-200 pages on Loans, Lawyer, Games.... don't expect much because the competition is so high.
To put it into perspective... I generated 32 Million pages of "UNIQUE" content and in 4 months about 250K of the pages were indexed and I was making about $400 a month. My content spanned millions of topics and adult and software piracy related topics generated most of the pageviews from google. I used various methods to get over 5000 inbound links in that four months.
Had I tried to guess which 500 pages out of the 250K pages would generate traffic I would have been very very wrong.
You almost have to cast a very wide net to discover the under-exploited opportunities. If you can't auto-generate 32 million pages of unique content then you might be better off generating 100-200 pages of quality unique content that people want.