The general view of most publishers is that getting high CPC words can get them more revenue for example “tax attorney” which appears to have a rate of around 60$ per click.However such attempsts miserably fail.The publishers monetizing their sites with such words get the measly 0.02 $ or something similar per click.
The secret of adsense lies “Most Profitable Keywords” not most expensive ones.
If you really want to get some higher rate per click.Try profitable keyword search.
examples include
Insurance ;all related things
hotels
e.t.c
I hope you found my article informative and useful.
Any feedback will be welcome.