Best race for summoners?

[Jennestia]

Go Galka, that way you can survive at least 2 hits while resummoning.

Race is only aesthetics in this game, being a different race will not affect your stats what so ever so it is entirely up to how you want to look

Actually, races do have slight racial and gender bonuses and clan bonuses, however it doesn't fully matter as the stat system in this game is formulated badly.