world 88 is very good. enough people to be safe, but there's virtually no lag (and bots). you can manage at least 75k xp/hr pure dropping, so low alch should definitely be higher, 100k doesn't sound too far-fetched in all honesty. im not sure how long an urn lasts, but a juju mining pot tasks 20 minutes for all 4 doses, so form a ratio and plan accordingly, leaving about 4 spaces for your nature runes, coins, and ores, if you are low-alching. if you can set up your mousekeys to superheat then drop the ores, id definitely say go with superheating. otherwise, i frankly think youre better off focusing completely on mining xp and doing smithing through assists/addy plates later, but that's my personal opinion.