Basic questions re: razz

[bcubed72]

I've started playing HU razz at Full Tilt. Not enough time in to make any conclusions, but I'm doing OK. Think that's more that nobody knows how to play either vs I'm a razz god. (Plus it seems easier to know--at least prior to 7th st--when your opponent can't possibly have you beat.)

Couple quick questions:

1. Any time you're up against a face (and you're 3 cards lower or so), I'm guessing you've got an auto-raise if it's brought in for the minimum. True?

2. If you have the K showing, when do you call the obligatory raise? A2K vs a 9 showing, probably, but how good do you need to be? (I'd think at least both hole cards lower than opponent's up card). I'm also assuming that you limp in, no matter how good your hole cards are, because you don't want to get into a pissing contest w/ a K showing.

3. Also, I don't see much point to slowplaying, but how do you know when to bluff an opponent who's shown strength when you catch a low on 5th, say, and he catches a face or pair (even though your hole cards are awful)?