Did you experience any sort of demonic retaliation after praying the Auxilium Christianorum prayers. I did 3 times not far apart but they subsided. Then I started praying Servite rosary along with the other daily prayers as required by the Society of the Most Sorrowful Mother, the Doloran Fathers aFr Ripperger is part of. Now I've had them come at me again.
The worst was one night I was reaching for my copy of Deliverance Prayers For The Laity and I envisioned the most repulsive image of a demon I've ever seen in a painting or otherwise. It didn't frighten me but I immediately made the sign of the cross and it disappeared.....
This would tell me, not sure why it doesn't tell you, but this would tell me in no uncertain terms that something I'm doing is wrong. If I tied it to Fr. Ripperger as you do, then that would be the immediate end of him for me.
Some years ago I listened to a few dozen of his sermons / talks and they were good, but, not sure how I would describe them exactly, maybe simply saying that his are sermons given by an indult priest is the best way to describe what you will hear. But thankfully, I did not experience what you did.
Anyhow, his book Dominion has allowed me to figure out what type of demonic influence drives my habitual sins. In my case it's demonic oppression.
We have zero, I repeat, zero reason to delve into the source of our temptations any deeper than to know the devil is tempting us. This is a curiosity that is not only dangerous to delve into, there is something a bit perverse about it as well. What you describe strikes me, or is likened to him writing about us trying to figure out a particular devil's personality, scary for him to even publish such a thing, even though these days I think most would disagree.
What we need to know, and *all* that we need to know, is the best methods to avoid temptation so as to not sin.
I could go on about the reasons why I stopped listening to him, suffice to say that there is a lot he says that does not need saying, a lot that does not say, and some things he should say that he does not, just the same as many [indult] priests. I used to wonder if the revenue he generates for his order has anything to do with it, but I don't really think that's it. I think he waves both the trad and NO flags - as do all indult priests, and this is what came out in the sermons I heard.