I've been working with a client who got utterly destroyed by the penguin update, and thanks to an astonishing number of crappy directory links dropped off the radar entirely (was on first page). It has taken me eight months to get this site back to page five using white(ish) hat methods but now I need big results so it's all or nothing. Ive not done a great deal of tiered SEO before so this seems like a good chance to dive in head first. Here's my plan. Does it look reasonable to you?The main keyword gets 40,500 searches a month and is declared by Google keyword planner as being 'low' competition.