If your have close friends i would recommend to burst with them, But i seen videos where people have pet like (Elin,Magellan)and you know the earth's Wisdom skill Shield Defense i think it is like the first one o.o! But you use it on your pet then you and attack and repeat when the shields go off.
I don't know what kind of EXP you will get but i have seen something like that,But it could be worth a try^^.
Good Luck Bursting your earth (: