where should i train?

Hi everybody.Im a new player .I have a Sunmo lev 80 and and Archer lev 63. I really want to lvl up my Archer cho lv 90 to become a hero.But i dont know where i should train ? and an other question is how i can lvl up my Archer fast because Sunmo gets nearly all exp so my Archer gets little exp . Do u have any idea about what should i do to lvl my Archer faster !!! Im really bored with lvling too slow like this

then your answer is ghost jack sparrow, i'm use fire nova until nearly death, paralyze and shoot, or if you have new power bow just cast power wave on it !!!