Question regarding PVP Cleric Options

[Lowlife]

With talk of the teams server, and a languishing red server always in need of another healer I've decided to bust the rust and hop back onto red99. I've always played melee classes but this time around I've decided to roll a cleric, with that said I have a few questions for the more experienced pvp server or duel enthusiast clerics among us..

Between Brell and Bertox worshiping Gnome Clerics, would the Brell restricted Dwarven cultural (and Str buff clickie neck) or the Imbued Black Sapphire jewelry of Bertox (and Mez mitigation Disease cloud clickie), which would be overall more useful for a longer period of time?

Pertaining to Human and Erudite Clerics.

I've heard differing accounts as to the importance to be placed on the Innorruk snare symbol clickie, is this even remotely viable in PvP? Does the Erudite's racial MR scale as you level or is it a fixed +5? I've heard varying accounts.

I appreciate your input in advance. Thanks.