[preiserone]

if you don't bet when you pair your door card it looks really awkward unless you came in from the bring-in. I think slow playing gives away your hand more than betting in this situation, they'll put you on at least trips probably. I might try for a check raise somewhere after betting 4th, other than that bet/raising

Here's what I probably do:

3rd call
4th bet
5th check with the intention of raising or just bet again
6th bet/raise
7th bet/raise

edit:raise third if people won't fold