I tune the drones first, assuming a concert set, I tune them to D using a tuning fork (electronic tuners seem to go wild when it gets dead on and I have found them mostly useless).
Then, against the drones, I check the bottom octave. That is, the back D and hard D, both of which tend to be sharp, then A and F# which are usually dead on. G will sometimes be sharp. I usually use small dabs of poster putty in the top of the holes to flatten the sharp notes down, and in the bell, I use a U shaped piece of plastic and adding enough poster putty to give an easy hard D in tune with the drones.
As far as adjusting the bridle, I like to have my reed opened the minimim amount that I need to get rid of the “autocrann” on hard D (I am puny and need something that blows easily).
If the A and F# tune well against the drones, then I proceed as above. If not, I raise or lower the reed until those two notes come into tune.
Usually all the other notes are OK, but I do have to fill in the bottom 1/2 to 2/3 of the ghost D hole to get the ghost D (very slightly sharper than the back D) and E to come into tune (it usually is slightly flat in the bottom octave but can be pressured up to tune with a slight increase of bag pressure.
The B and C# holes usually need nothing, but in some weather conditions, I have to flatten G slightly.
For getting the octaves in tune, it is a major adjustment of the reed, but after a few attempts, it becomes easy, and only needs to be done once.
If the octave is flat to the drones, you need to insert the staple farther up into the read head, I usually try in incriments of about 1/8" steps.
Bind the top of the reed lips and almost 1/2 the way down the head with some waxed dental floss or cello-tape, then unwrap the string tying the head to the staple.
I make a scratch on the staple at the tail of the head for a reference and slide the staple further into the head and re-tie the head to the staple. Stick it back in the chanter (you will probably have to close the reed slightly) and check and adjust the staple in or out of the head until the octaves are in tune with each other.
If the octave is sharp to the drones, you can either pull the staple out from the head as described above (you will probably need to open the reed slightly), or you can use various sizes of wire (broken guitar strings are good) to stick up into the staple.
Happily, both my chanters (D and C) have well tuned octave Bs but some chanters will have a sharp octave B. You can try rushing the chanter up above the thumb hole, (especially if you have a very sharp back D), or a lump of poster putty on a thin rush placed slightly below the B hole, or perhaps some extra wire folded some near the eye of the staple might bring it into tune.
Some chanters just don’t have something right in their bore to get the B octaves into good tune and you just have to put up with “that one note”. Most chanters end up having one note “that one note” that just can’t be brung into perfect tune.
You just have to “mess around” with it until you find the magic settings (and answer questions from curious people at the same time) that suits your ear.
Brian and I had a good discussion/arguement/whatever about tuning a while back, mostly about “tuning up fast”.
Since I have a perfect memory (I can forget everything!) I can’t remember who won… 
Here we go again with the absolute statements! Compare the hearing of a blind person to a tone deaf person. I think you meant “most” or “the majority” instead of “no”. And I am no super man, quite the opposite, I am about as strong as a marshmallow just now.
