I played around with this:
http://sharnett.bol.ucla.edu/ICM/ICM.html
And it seems like playing low PP's to hit sets is really close to 0 $EV as well as 0 EV. I neglected that you gain a lot of ICM value when you stack someone in a tournument due to eliminating him from the tournument. Assuming one guy takes your 15-30 chips, or you have 1600, and everyone else has 800 in the last case:
Chips $EV
785 0.0983
770 0.0966
1600 0.1844