An important thing to consider, both as GM and player, is that not all archetypes are ideal for PC's. Many archetypes are clearly intended for NPC's, and are just a mechanical way for GM's to justify more skill points, or that one cool power that the players don't expect. Ultimately, they will not stand up against the archetypes that are geared for the questing adventurer.
That being said, you may want to consider that as the Cardinal gains ranks in the church hierarchy, he does indeed become closer to his God, as this is a world with clearly present deities and divine power. Give him expanded access to the other domains in his patron's portfolio, like an oracle's curse gradually becomes more of a blessing. At 5th, 10th, 15th, and 20th, he gains a new domain, but the domain powers are delayed accordingly (second domain is treated as level-4, third domain as level-9, and so on).
That sounds to me like a priest that the other members of his order would greatly respect, but who is still unskilled in battlefield tactics and survival, which is what the archetype ultimately is meant to convey.