It's probably better to just watch training videos or talk to winning players in your game to find out what is recommended/standard, but I would think that - if it's a full ring game - you shouldn't defend very much in the BB vs UTG. Most offsuit hands apart from AKo/AQo will be total garbage, as they will realize their equity quite poorly OOP against a very strong/tight range.
I think it was Bob that suggested that vs a 3x open, he typically defends about twice as wide as the opener's range, but that's a very general rule of thumb. So if villain is opening 7%, you might be able to play 14% of hands profitably in the BB.
P.S. I don't play live, but is the rake in that game considered very high? In highly raked games, you should usually play even tighter. Save your wide blind defence ranges for battles with late position/SB players, and vs smaller opens. Calling 3x opens by UTG could put you in a lot of -EV spots.
EDIT: I can't say how useful or relevant this is for your game, but in a 100NL full ring game where UTG opens for 3x, this is supposedly the "optimal" BB strategy according to Snowie:
There are some fairly random 3-bets in there (the numbers), but Snowie thinks only 9.5% of hands are +EV in the situation I described. P.S. Snowie's chart is based on UTG opening 7.91% of hands. You should obviously deviate according to the looseness/tightness and indeed skill level of your opponent.
Last edited by ArtyMcFly; 07-12-2017 at 04:16 PM.