Rushing mq is best way for speed lvl up but it might be hard at late game cuz u will be out of mq n forced to grind exp for a long time to reach lvl cap.
If u can take boss dmg in ep1 then its a good idea to lvl at boss with 5 lvl difference. For example when my auto monk lv 124 i lvl him at f.grecia lv 127 and move toward further boss when my lvl gets higher. I got more exp% and also crysta/rares which is good to sell. I think boss until b4 elban is ez to fight with equal lvl cuz they dont have any serious debuff/dmg.
Or u can try grinds the exp mobs i list from low to highest exp.
Neknott High ent Megaroche Balor Baum warrior (lower xp than yarde but great spawn) Yarde Third eye Moss golem