Well yeah I post It because i did some test and I also gona post more xD!!! and yeah! CHARLOTE can burst mine get to lvl 27 in 30 minutes she gets 2.4k and more if u got a good team!!!!.
Charlotte cannot be bursted , her Vanish is a selfish assist e.e not buffing or debuffing, which doesn't give her any exp of any kind , she get that exp from killing x.x (Can just as easy to use exp pots for her, since she's not debuffing)
Tip : don't use water shield on your cow if you burst Sam on a fire/earth/wind because if your waters's cow gets double water shielded, the exp would drop by high amounts o.o
and, my lvl 180 fires got 1.5k atk and 1.5k matk, fire mage got lame gears e.e, they do 64-69k damage though ^^ 2 way critical , and after I get my Zelix DS it would be higher xD and after reborn and a bash saddle, can ger her 1.9k atk o.o