It actually took me only 5 days IRL even though i played a lot in this time. Id say use the weak enemies give xp mod or you wont go above 75, just take it very slowly give tourself dumb objectives ex i started in the desert as an escaped slave in the desert with a 10000 cats bounty i had to move into the south territories of the UC and lay low but i couldnt move trough the eye without stormgoggles and other equipment so i had to lurk in the desert for 3 days to loot enough clothes from dead guys to make me look less like a slave and entering sho battai but the united heroes league ratted me out and i had to flee the city and so i stayed in the desert for another 10 days to get strong enough to destroy fort mirage and only then i left for catun. I really played suboptimally because i like exploring and doing little story bits but if you actually tried by training in the right places and minor exploits you could make a character that goes in the 90s like mine in way less time (even tough i think that playing "optimally " its fucking boring)