Sykar
What do I care that Anomen is illegal? That's irrelevant to the question of power. Imprisonment (demiliches get a ranged version) is not the only spell to ignore mr, dispel is another. Which is why if I want a tanking cleric, I'll choose Aerie. With SCS enemies are better at choosing & switching targets for both melee and spells, and her defenses are more varied. If I want a fighting cleric, I'll choose Anomen, because he gets more attacks when dual wielding under ih & with less penalties.
As for ranged attacks, plenty of npcs can wield the reflection shield. I consider giving it to Viconia a waste, because she doesn't have the melee power to take down e.g. a fallen solar quickly. It'd have to be bait & switch, which is too much micromanaging for me (and can be executed by any npc wielding the shield).
And that's the problem with Viconia. You can stack items on her for 100 mr, but her offense will still be lacking. If you give her items such as the shield, that means those items are not being utilized by someone who is better offensively or defensively. Her being able to cast a few more spells doesn't make up for that.
edit: And as for turning, that's level dependent. If you get them early, Anomen joins as a higher level cleric than Viconia. Including earlier access to higher level spells. And it will be some time before she takes over in terms of levels.