Card Dead in MTT - When to start calling/trying to steal

[MrHorace]

I searched for posts on this topic, but didn't find any, but if there are, please point me to them.

In multi-table tournaments, where you don't get cards or get playable cards out of position, when do you start deviating from standards and simply call with questionable hands or raise trying to steal.

I'm talking about hands like J7o, A8o in EP, and other hands that have no steal value.

Is there an M level at which you should loosen your standards considerably for a hand or three to see what happens?

Thanks,
David