It's actually a tradeoff. I just ranked a website for three terms,
1st KW 90.5k exact, 8k usa, $1.23 CPC, 0.04 comp (EMD)
2nd KW 90.5k exact, 12k usa, $0.50 CPC, 0.03 comp
3rd KW 27k exact, 4k US, $1.23 CPC, 0.04, 0.03, 0.03 comp
and it was shit easy to rank. costed less than $5.
5% CTR on Adsense. Going to try CPA once my exams get over, should make more hopefully.
Plus, this website is ranking for like 300 terms, and can rank for around another 50 big terms(over 20k exact).
What do you think will be better? This, or a MNS with 1.5k exact, 1k US, $1 CPC, and 0.50 comp?
Plus, never forget about Interest based ads when you're using Adsense. And the adsense CPC isn't everything, some niches are more suited for products, some affiliate products, some amazon. CPC and comp. isn't everything, your ability to monetize that traffic is what matters.