try cooking. its the easiest and fastest i think.
from lvl 63 (when i started) took 21 days at 5-6 hours a day.
63-90 (i did lobsters)
90-92 (i did monkfish)
92-99 (i did sharks)
from 92-94 (cooking gauntlets used) you only burn about 20 sharks
any more questions ask me
~death~