i think one of the weakest races is human because they have no good techs like LS , Saiyans , Demons
A good tech for humans could be neo tri beam cannon , Ki cannon , A melee homing attack , it needs a techs that makes humans stronger in terms of techs.
Weak In techniques , not weak on Transforming , if they had good techniques on par with Saiyans , Legendary saiyans , demons ,etc , they could become equal to them or maybe even stronger , i think killer Omega blast from LS shouldnt be the strongest tech in the game , the Strongest tech should be a human tech to make them equal the other races :/