Ripperger has been refuted from primary sources. There have been many long threads on this subjet, but one of his apologists / water-carriers finally cited the passages from St. Alphonsus, and so I looked them up, cited them (go look for it), and the sleight of hand was accomplished by Ripperger conflating two separate things, where you can't make requests of the devil and then speaking about how only exorcists can perform solemn exorcisms. So Ripperger blended the two and claimed that lay people can issue commands to the devil, just so long as it's not a solemn exorcism. But that's false, and I cited St. Alphonsus in the very same passage where he states that only those who have authority over the commandees, aka, the demon, can issue commands, i.e. exorcists. But that part was skipped.
There's absolutely zero precendent, nada, zilch ... for laity having the authority to issue commands to demons because the people they're afflicting are under their authority. Not one shred of precedent for this imaginary principle. That is why, as Yeti pointed out, there's absolutely nothing in Catholic Tradition about "lay deliverance".
I will get back to this more, as I have to go somewhere, but it's 1000% clear that people who attempt to exercise demons are playing with fire and are going to get burned, lay exorcists along the lines of Pablo (who's very possibly possessed now after all he's dabbled with it).
As for the "Vade retro, Satana" ... it was Our Lord who issued that statement, and it's printed on the St. Benedict Medal because it's the Church's blessing of the medal which gives authority to that command, i.e. it's the Church making that command from the blessed medal, not you. Outside of the medal, if you saw a demon, and had the temerity to pronounce (as if you were Our Lord), "Vade retro, Satana!" ... he'd laugh in your face and rip your ass to shreds, if God didn't prevent it. And that's the only thing preventing the lay exorcists from getting absolutely crushed by the demons they're attempting to exorcise.