both are good, but I recommend Druid first, since the grass is gonna heal you and help you doing aoe damage to deal with a good amount of monsters in the beginning. Rubric is a really good option, but the fact that rubric is linear you’re gonna have to gather monsters the most close to a line to get better results, so pick druid, the grass and thorns are really helpful for fast leveling, besides rubric and katadikazo is gonna be your main AOE damage so, if you start with exo, you’re gonna be stuck using only rubric and Aqua benedicta in between for a while