Well, my girls are finally pretty much geared (10k hp, 9k mana, 840 spell damage, 21% base crit, 350 res) and I'm doing 5's seriously now vice farming points off of some friend's 3's teams. I'm looking for some basic direction on strategy that has worked for you if you feel comfortable sharing. To begin with, what I'm doing now:

Blade's Edge: Set up totem farm at one end of the bridge, maybe a bit more towards the center.
Nagrand: Usually set up shop towards the center of the arena. My experience was that staying right next to a pillar allowed the other side to LoS me much easier than if I forced them to come out to me.
Lordaeron: Ugh, my least favorite. Usually we would go to the far right side and set up the farm. This way they have the smallest possible angle to LoS us over.

Totem farm consists of 4x staggered Tremor, 4x Grounding, 3x Poison, 1x Mana, 4x Searing. I go with Water shield as with only 9k mana I've had mana become an issue in many games. Target selection is usually Dps and then healers, with Hunters and Warriors being my first big targets. I'm using a Shaman healer who's in full S2 with a smattering of S3.

To be honest I'm floundering in the mid-1500's. I could say that part of that is the gear gap (Every team we've fought has been at least full S2) but I don't want to cop out; I'm looking for strategy help Do you have any suggestions? Are there any nifty things you've discovered that've made a big difference in your competitiveness? How do you go about target selection? What do you do against a team that can heal through LB/LB/CL chaining (We ran into a Hunter/Priest/Druid/Warlock/Shaman team that was easily able to heal through our full damage output ugh)?

In any case, much thanks in advance!

P.S. Of course anyone with insight is more than welcome to provide input. I wasn't trying to make this personal