Well, for most of those KO tournaments, the KO reward is much smaller then normal price pool (like 15-20% to KO).
So you should play that close to normal strategy, and exploit the ppl going for rewards.
Of course if there is a spot which is about even in chips and you have nice chance to collect some rewards, go for it. But still the main taks is to get chips and reach FT (the rewards will come along the way).
I like those, because they have softer field from my experience.