For some reason, my AtSB and VPIP/PFR are both a few points lower at Party 3/6 than they are at 5/10. You may be happy bumping up the steal to 35 or so, but if your button/CO WR isn't all out of wack, I wouldn't worry about it too much. Right now we're looking for why you're dumping money, not ways to add marginal hands.
Also,
this thread is interesting.