A friend started rotation with exori because of mana. Exori gran will always deal more damage, but in this level your mana pool is low. So the rotation he uses is utito, exori, exori gran, exori, exori min, exori gran, exori, exori min. Try to walk to make sure your min will hit 3 monsters. Use your weapon attack to balance the life of monsters and kill them together always as possible.
At higher levels, the strongest combo for mobbed places is exori gran, exori mas, exori Exori gran, exori, exori mas, Exori gran, exori, exori min. Always keeping utito on.
For bosses the rotation is exori gran, exori min, exori.