I leveled old school smn
after toau came out..so I guess that won't exactly old school old school but I did it using the old school method as I leveled 1-75 90% solo..on bombs....
like garlaige citadel basement bombs and ifrits cauldron bombs. I dinged 75 at the top of Ule. Range on bombs! it was not an easy life...
I only remember duoing once and being in a party once or twice...usually I just logged in and solo'd for an hour and then logged off and went to class. It took me like 2 years to do.
best part was exp chaining by yourself <3
now I did level rdm in ye old early days..took me also 2 years to level rdm to 75. I was forced to take like a 6mo break there because of having to move..but dude, if you leveled up a single level in a couple of days you were moving fast.