The spiked chain isn't good for a conventional rogue build (being prone doesn't allow you to sneak attack, so tripping isn't very helpful). If you want to go melee and can rearrange your stats, I would switch around int, dex and con and go for a 2WF rogue:
dex: 17
con: 18
int: 15
Rogues are so fragile that, if you want to go melee, I put con over even dex. This style of build has two main problem: multiple ability dependency, which doesn't matter to you because your ability scores rock, and the fact that sneak attack relies almost entirely on flanking.
I've never used feinting much; it essentially guarantees one sneak attack per round, but no more. I think of it primarily as a backup option for when you can't flank.
If you want to go ranged, you can use hide to set up sneak attacks. Later, friendly wizards casting improved invisi helps.
-Elemmakil
PS:If you are going to use a spiked chain build, I recommend picking up improved feint over deft opportunist. Oh, and grab weapon finesse ASAP. The problem with this is that you need strength to hit well, dex to get good AoO related stuff and a decent AC, and con to survive many hits with a d6 hit die. Plus, good tripping builds tend to take a lot of feats. Combined with the fact that this doesn't synergize well with sneak attack, I discourage it.