to begin with, lets assume that, by definition,, God is omnipotent. this would give him the ability to aquire omniscience. Because God is omnipotend, then he could also create a defition of good and define it to be self-consistent, whether or not our logic would view it as consistent. As God created the definition for good, he could conform to it without any contradictions, allowing him to be omnipotent, omnibenevolent, and omniscient at the same time.
I believe this would allow god to be all-omni, no?