H, I look at it like, the Anagogic summoned Ciphrang use anagogic sorcery whilst also being giant armored tanks.
A gnostic summond Ciphrang would be the same giant armored vehicle of death, but using gnosis instead of analogies.
If a schoolman is strong, and two schoolmen are twice as strong, then a schoolman summoning a pet that uses the gnosis is as strong as 2 schoolmen. Though, in this case, there is the added bonus of mobility, meat shield, and physical stopping power not against chorae bearing enemies.
Schoolmen dont like getting their hands dirty, and have qualms about running into a wall of chorae bearing bashrag, or storming a gate or literal wall where chorae bowmen sit. A ciphrang can take things like this out, probably dying in the process, but who cares. Kellhus is the savior. He says your soul is saved, so what matters what a lowly demon says about eating your soul. Just summon another one.
I personally dont think that a gnosis summoned ciphrang would be any different than the ones we have seen. Its a matter of binding critters from the outside. Though, it does seem strange that such things would use analogies in the first place.