Hey guys, i'm reading so GTO poker theory and i'm kinda confused on a point

Here the scenario: vilain raise preflop, we call ip, everybody else fold; vilain cbet, what value/bluff ratio should we have when we raise here?

So i first let Juanda talk:

so 2 bluff for 1 value;

but let's say vilain cbet 6bb on 8bb pot, we raise to 18bb, if vilain 3bet here to let's say 38bb, he risk 38bb to win 8+6+18=32bb, which leads him to need 38/70=0.54% Fold Equity to make an immediate profit

or with our 2 bluff / 1 value ratio, we will fold 2/3=67% of the time, and we let vilain exploitate us

so if he need 54% FE, to be unexplotiable, we should have a 1 bluff for 1 value, letting him 50% FE

so do we raise his cbet on the flop, being in position, with 2 bluff for 1 value or 1 bluff for 1 value ratio?