I use a 14mm combination open end and ring spanner with offset, the open end just happens to fit the 1/2 drive of my torque wrench, so I set the correct torque and feel how much pressure I need to apply to the spanner before the pin pops.
Then put the spanner on the nut and try and simulate that pressure, go full torque in the recommended pattern, no sealant on the gasket, and always new washers, yokes, studs, and nuts.
I do however use nickle based anti seize on the nuts, washers and yokes.