Known players:

Preflop: Hero is SB with 3, A.
CO posts deadblind, 4 folds, MP3 raises to $30.00, 2 folds, Hero raises to $85.00, 2 folds, Hero gets uncalled bet back.

OPP. 22/17 ATS 44 RFI MP 20% FOLD TO 3-BET 76%

You want to play 3Bet/fold in that Spot? I dont think thats the best line! :)
I think it is better to use your maximum Foldequity with an All-in to make Villain fold most of his hands, if he has fitting stats in MP3 (in PT3 you have exact position stats and i look on them). But in this case with the deadmoney you can easily look on his CO-stats, because he will probably be looser than he would be without the deadmoney. And then it is a profitable push.

if he folds 76% it is +ev but if you got called you have to think about your image...

handjudge DaLung
Which samplesize?
Besides, you must consider that a huge percentage of his "fold to 3bet" is against BSS players.
If you have got 76% FE, its obv profitable to 3bet anytwo but i dont think you got so much FE.
And you lose FE in other spots if you 3bet so loose.

professional handjudge ThinkTank80
in the box (and ignoring the bigblind)
you need about 60% foldequity to get this move +ev

however in reality
you have (as said before) to think about your image on the one hand
and on the other you normaly don`t have the full foldequity stats tell you as a shortstack