Late Tourney Bluff

[DyessMan89]

* MTT down to final 6 players with a normal payout structure
* 100/200 Blinds * You have a large stack (c10000)
* UTG limps, MP1 folds, MP2 raises to 1000, SB folds.
* You have 34 offsuit. You have a read on UTG for a mediocre holding and MP2 for a hand that would fold to an all-in reraise. (KQ,KJ,KT,55,22,etc) MP2 has 3500 chips left .
* How certain do you have to be to make an allin bluff here? And even if your near certain, is it worth the risk?