We have the button and we're going to make more money than CO, so stuff more money in preflop.
The good thing is he is going to fold the majority of the time and that's fine, with 99 getting his air to fold isn't a bad thing because a lot of it has good equity against us anyway.
Raise-folding is perfectly acceptable the rare times he has a monster.
By flatting you're inviting the blinds in or begging them to squeeze you with 88 or AJ.
By 3-betting we can actually represent a hand on a board like this (OMG he haz da AK) instead of calling down and bluffing
a pretty good river for villain's range.