I would not target 200 keywords in one go but separate out keywords in order of competition. Make a list of those first with most competition.

Add adjectives to the list of most competitive keywords and end with a new list of keywords that are less competitive.

Let us say you want to rank higher for Web hosting. Quite competitive and so instead of working for Web hosting as a keyword I will add few adjectives to it.

Best web hosting
Cheap web hosting
Or even things like
Best Cheap web hosting providers.

Work on those type of keywords and build backlinks.

This ways I am not only going for a lesser competitive market but also working on my final keywords of Web hosting.