brontos arent that hard just one char with genji glove and offering and anther with normal attack is enough

oh and a way for better leveling (imo) is to use 2 char teams one with exp. egg and a relic to your liking the other (preferably) max level offering genji glove combo with atma weapon and ilumnia ecuiped. then fight in t-rex forest

this will reduce te exp a bit (although you still level extremely fast) but is much safer