live tourny wtih antes - push or fold when?

[DAS2006]

just played a live tournament lately and was wondering: when do you start to play push or fold? i mean obv. when you have 10 BB or less, but shouldn't you start with more?
i mean, pushing at such a tourny is +EV. i mean big time. i would put all this guys on a callingrange of AT and higher and 77 and higher. maybe KQ.

hope you can help me with this.
thx