This detachment's own printed rule says: "This detachment has the REVEREND tag and cannot be taken with another REVEREND detachment." That much is first-party and settled.
What is not settled is which detachment that restriction bites on. The Munitorum Field Manual v1.3 lists [Champions of Faith](/40k/armies/adepta-sororitas/detachments/champions-of-faith) with the same REVEREND tag. The Faction Pack's Champions of Faith spread prints no tag at all. Two official documents disagree, and we assert the tag but not the restriction.
> We do not know whether Sacred Champions plus Champions of Faith is legal. Confirm it in the Warhammer 40,000 app.
It matters because Sacred Champions is 1 DP and Champions of Faith is 2 DP, so the pair costs exactly the 3 DP a Strike Force budget gives you. The arithmetic lands on the one army whose legality is open. That collision gets its own page, and we never suggest the pairing in either direction while the question stands.
Everything else is fine. No other Adepta Sororitas detachment carries any tag, so pairing this with [Bringers of Flame](/40k/armies/adepta-sororitas/detachments/bringers-of-flame), [Penitent Host](/40k/armies/adepta-sororitas/detachments/penitent-host) or [Army of Faith](/40k/armies/adepta-sororitas/detachments/army-of-faith) is unambiguously legal. So is running it alongside two other 1 DP detachments, because carrying a tag is not the same as sharing one.
This is SprueSentry strategy commentary, not official rules. Written against the official Adepta Sororitas Faction Pack version 1.2, legal for matched play from 26 August 2026, with Detachment Point costs, force dispositions, Unique Tags and enhancement points from the official Munitorum Field Manual version 1.3, read on 27 August 2026. Adepta Sororitas were part of the 26 August reissue, so the pack was current on the day this was written. Enhancement points are dataslate-volatile; the Warhammer 40,000 app is the final word.