4 hours 11 minutes for Current Shadowlands 10-50 leveling speed with consumables/enchants (No heirloom EXP %, WM 30% bonus) : r/wow
WoW MoP - Monkey Run Guide - Fast Leveling 85-90 - YouTube
Making leveling from 80-85 ridiculously easy: Found a blue MoP 2H sword with lvl 80 level requirement on AH for just 300g, and for comparison a 2-hander from Yor'Sahj heroic : r/wow