What Should I Do If My Elder Brother and Younger Brother Are Too Strong?

In a world where ten races compete for hegemony, The collision of magic and alchemical technology, The struggle between elves and the undead. There is no martial arts or training, just the combination of magic and body. Watch the protagonist, a summoner, bring the League of Legends system to another world and his seven teammates to make mankind the overlord of the world. There is no old routine like before, the protagonist is not performing alone.