By +EV, I mean: assume I'm a 4 to 1 dog against premium PPs. If flop is good for me, I make 800, since AA or KK usually give up all their chips. If it's bad I lose 100 4 times (since I'm not committing anymore than 100). Plus, often, a bluff works when scare card comes since I was EP raiser (this is assuming I wasn't reraised pf).

I don't believe there is a big difference between 800 and 700 chips in levels 1 and 2. But I'm sure others will disagree. I get back up after going down to 700 when I lose.