Buffing exp outside of NMs only makes a difference until you are leveled up. Would need to make anemos crystals available at a significant rate for chaining enemies too, then I would just go solo somewhere on the map away from the crowd to gradually earn some equipment.

Exp should be reduced to zero for players doing things massively outside of their level bracket like lv4 people at the lv16 NM, while buffing the exp they get for chain mobs and NMs at their appropriate level so we can get rid of the afk people camping things in places they shouldn't be yet. They have to to actively participate in battles at the right level range where they are able to make a contribution.