In the face of Altman's long-standing setting, no matter how powerful Otto soldiers are, they will inevitably be defeated by their opponents for a long time. It's like the first generation of Altman, who has super strength in the TV version. When he finally fought Jayton, he was finally defeated by Jayton. Finally, thanks to the appearance of Zofi Altman, the reborn first generation Altman finally succeeded in fighting and defeated Jayton.
In the face of such a setting, although Rosso and Broutman don't have the strength to fight against the dark Ober now, in the follow-up plot, the dark Ober is the villain after all, and Rob Altman, who has a leading role aura, can never be defeated by the villain in this way. Because of this, Rob Altman, after gaining new strength, will certainly successfully fight back and finally defeat the dark Obo with greater strength.
In addition, in Altman's works, each Altman has a protagonist aura, and they are the core of the whole work. Once they die, the whole work of Altman is completely over. For such a situation, it is very intuitive to see that Rob Altman can't be defeated by the dark Obo anyway, and it also proves in disguise that the dark Obo will eventually be defeated by the Otto soldiers. So Robert Altman's new form can definitely beat Obi-Wan.