dbcooper2,
(Nice user-name!)
I can't possibly advocate taxiing at Nr below the green arc, frankly. Operation at low Nr is not tested, and could lead to heartaches in places we just don't know. Sorry I can't be encouraging!
For brake wear, the best technique is to be SURE the disk is level (the stick is back) during taxi. If you leave the disk tilted down so the blade tips are at or below the horizon as seen from the pilot's eye position, the aircraft scoots along too much, and the brakes will wear. This is because the 5 degrees of forward main shaft tilt mean that neutral cyclic is actually lots of forward disk tilt.) If you practive holding the disk above the horizon by about 1/2 meter (the same at the nose as it is at the sides) the aircraft won't accelerate at all.
You can practive this cyclic position by going to the runway, making the cyclic truly neutral, and then just lifting the collective a bit. Then tilt the disk aft a touch and note a rearward taxi. Then tilt it a touch forward and note the forward taxi. As the aircraft rolls forward, lower the collective and let the aircraft achieve a slow forward roll, then stop the forward with just pulling the cyclic back to neutral with a little up collective (don't use much aerodynamic braking, it is a bad habit in all helos to use a big aft stick, especially causing complaints from the mechanics when you take a divit out of the tail driveshaft cover!)
Also taxi turns with moderate speed require no brakes if you use moderate cyclic in the direction of the turn to keep the aircraft level as you turn. This means that you don't have to brake and slow down before you turn. Unlike some bigger helos with slab sides and narrow gear, the 76 has no great propensity to roll over (a rare case did occur once, but it was a soft ground, muddy terrain roll-over nightmare that is not the general case.)