Level 51 is the best level to make Essence Emeralds with. Just keep repeating that level. You end up with ~20 and you can do level 51 in literally 90 min maybe if you know what you're doing. Way more efficient than coming down from 59. Or just kill yourself down to 59, sac about 9 times, then rez back to 60 and max out 60 again.

Why 51 and not 46 to 50? Seems like going from 46 to low 50s over and over would be some really easy money if you also farmed something like guards while leveling.

Probably since my perspective is bard swarm xp - ~90 min in BW as a solo bard = lvl 51, below that you can't kill th emobs as efficiently. Just personal experience has taught me is all. I don't have any math to back it up or anything.

20 x 200pp = 2500pp per hour ish, guess it depends on your definition of bang for buck to determine if that's good money. of course you have to sell them too... or just stock up your favorite necro buddy knowing they'll come to your aid sooner or later.