Just wondering what the ideal feat selection is for a rogue. I've gone half elf with fighter dilletante, from what I can see, more crits is better than fewer harder crits for a rogue, so I'll probably end up wielding scimitars, but for the first few levels I'm wielding an antique greataxe (you should see the look on people's faces) until my to-hit reaches acceptable levels.

Because of this, I'm struggling with feat choices, here's what I have so far:

Toughness
TWF

And here's what I guess I'll have by 20

Toughness
TWF
ITWF
GTWF
IC:Slash
PA (unless it causes large issues with to-hit)

This leaves me with a feat to play with, so I was wondering what I should take. Oversized two weapon fighting? At the moment the feat I like the look of is sap, as it doesn't seem to have a save, or failing that, maybe just another toughness, more hp is good hp

Any ideas?