in a duel Psukhe and the Anagogic have both overcome each other on screen, so they have some overlaps in ability. It will depend on the wielders relative knowledge base. Plus individual conditions.
I suspect Meppa would best the Primaries we saw in TTT.
Now to indulge myself, taking away the folk with Dunyain blood. As of right now the last person i would want to take on in a magic duel is Akka. Back in TWP Kellhus after weeks studying him thinks about how everyone who knows him thinks him weak, but in actuality he is a lot stronger than anyone can imagine, just some people need experiences to shape them. Well jump forward a couple of decades and Akka is certainly being shaped...
He's also taken on all comers, sometimes rolling straight out of bed to do so. killed Cish while at shimeh years before the book. Wakes up straight into a handicap match with the best of the SS. Escapes torture transitions to seswatha, lays down a beating, takes out a demon too.
Then from post coitus to routing an imperial column and taking out 4 imperial saik , just as he finishes that off in comes an even bigger demon, which he manages to just beat after it carries him for miles, goes back to collect his wife and tell AK he is a fraud.
Various run in with sranc and scalpers over 2 decades. Then out of retirement again for some even bigger challenges. Sranc, Bashrag and chorae. All taken out. Then after being hogtied the length of earwa he is released and walks straight into a fight with the FATHER OF DRAGONS, routs him then his tag team partner betrays him and he has to take down the Nilgiccas, in some say was a rigged match.
Right now he is at the very end of his tether, his child is about to be born, someone is going to get it.