the 6th first. and i would never tune high. the strings
are engineered to sound good at a certain tension and
your guitar is set up ( or should be )with the strings
at that tension. if ya tune up ya kill your strings
sooner. the reason for changin the 6th first is that
it as the biggest tension against the bridge and will
stretch, so i put on a new 6th..tune it....replace the
5th tune it then retune the 6th then the 5th again, then
replace the 4th.retune 6th, 5th 4th...etc. i think ya
get the picture.