I can do this job for you faster than anyone else.
My price is 50 gp / XP + bonds on 10-20 accounts. I will guarantee 45-90K xp per hour (depending on number of bonds) and will not bot on your main account.
Total cost for 91 is 5900k * 50 = 295M + 20 bonds (80M) + 10 potential replacement bonds (40M) = 415M. Requires bond payments upfront then you can pay for the XP by the 100K-200K.
Time frame is 132 to 66 hours of game time depending on where in that 45-90K range I fall. Could complete this in a week and a half easily.
EDIT: I will be crafting nature runes and keeping the runes as well.
Really curious how you are getting anything about 33kish xp doing nature's let alone 90k? You plan on using runners? PM me if theres something idk about RC