Bug's clone doesn't really seem to have any special abilities besides his body manipulation and his possibly adept sensing abilities, since he was able to sense Ada watching him, which no one has done before. Moegi at least has Wood Style, so that may have transferred over to her clone, which would prove deadly. Hidari has Sasuke's abilities, so that obviously automatically makes him one of the strongest out of all of them. Jura seems to have this aura of power and superiority, so he may be THE strongest or the second strongest behind Hidari.