Going to another universe doesn't remove a status effect, which is what paralysis is. That's like saying someone can remove a fatal poison just by hopping over to another universe. It doesn't work that way. It's not like mind control where he needs to maintain contact with her.
He doesn't need to "start off" with TK if he's already paralyzed her. If the portal opens up underneath her, all it takes is a single thought for him to catch her before she falls.
Ras has a sixth sense that allows him to know the locations, identities and emotions of everyone around him, and as shown in one of the quotes, he can even sense the specific nature of those emotions. She won't catch him off-guard. If anything, she'll be the one off-guard by the fact that he not only sensed her returning to life, but reacted immediately and incapacitated her again without a second thought. And then, once he's realized she can resurrect from death, he can hit her with sleep inducement for an incap. Or do his own equivalent to what she planned to and open/fling her into a bottomless hole that opens up into another reality dominated by the Otherness.
Just looked up the Infernal Communicator. It looks like she needs a hand motion in order to activate it, which is obviously null in this situation. But summoning demons to attack him is already bad money; A girl who could call Otherness creatures to attack her foes tried doing that to him, and he ripped control of them from her like it was nothing. Then, after letting her struggle to take back control over them, he turned them on her and had them eat her. And this was his weaker 9-B self, before his powers had made the jump to an interstellar scale.
He doesn't have a calc for his rating, but as far as the actual feat goes, he rearranged the constellations in the sky just by willing it. It's left vague just how much he moved each one, but Glaeken stated that the constellations had been rearranged.
And all of this is moot if she loses her sanity before it can happen. A possibility that still hasn't been addressed, and should be, since insanity inducement is one of his passive abilities.