Best ISO farming metod?

ShenAbuser

I need A LOT of ISO. Is there an easy and fast way to farm it? I got most of 4* champs soo i guess 4* shards would work too. Any tips ? Thanks

H3t3r

Arena. And getting any and all 4* related items each EQ

ReignkingTW

You've got it -- dupe 4*s.