Hmnn..... well i can think of a few things, but the most likely option for Anubis to have a chance would be to find some way into disabling the Priors to his will, perhaps he could build an frequency generator to disrupt the Priors special abilities with his knowledge through his own clone and the manipulation of DNA, then after the Priors abilities are disabled all Anubis has to do at this point is find an symbote that is loyal to only him, perhaps a gould that is programed to be in the service of Anubis due to that same knowledge in splicing DNA.
take the prior as host and gain all knowledge, rinse and repeat to the point where he takes hold of all Priors and uses the Priors staff to steal the hearts and minds of the worshipers to the point where the Ori are at an weakened state where they are not as powerful.
However i doubt Anubis would get to this point because of how watched he is, the others would stop him, however they might use him to do this so they can eventually take on the Ori and take their power like Adria did.
