Ok here is an average example of what it is like for me in a wsg. I spawn at gy buff up, shield, and renew myself. Get on mount run to about that giant stump since im horde and then get 1 shotted by a rogue. Im really not sure how im suppose to defend myself against that.
If you have advice to this example please let me know im open ears here.
When you say "one shotted," do you mean genuinely killed in a single GCD? Or do you mean you're getting killed before you can get out of the stunlock and fight back?
If the former, then yeah, I don't know what advice to give you other than to level up, change specs, or do some twinking if you really want to do well in this bracket for the time being.
If the latter, do you have a.) Pain Suppression and b.) the glyph? If not, get both. You're already pre-shielding, which is good. Hit that Pain Suppression button as soon as you get stunned. That plus shield should get you out of the stun still alive. Don't ever trinket out of sap, save it for the kidney shot (Theo or others will have better advice about when to use your trinket vs. rogues).
Now you're out of the stun alive (even if just barely), immediately hit Psychic Scream. Heal up while he's running away. Even if he trinkets the fear, if you start running the other way as you're hitting Psychic Scream, you probably have time for at least one tick of Penance before he gets back to you. Keep moving, re-shield yourself, Renew, then stop and Penance/Flash Heal up when you can. If you haven't got time to get the heals off, use Power Infusion to speed them up.
At this point you're back to full health or nearly so, and shielded. You can DoT/SW:D/Smite him to death while staying shielded/healing yourself if he sticks around, but it's more likely that at this point he will just vanish and run away like a little girl, because the thing with rogues is, if they don't kill you in the first 3 GCD's, they aren't going to kill you at all. So you just need to figure out how to survive those 3.
If none of this is working for you, then I'd suggest for now speccing Holy and trying that. You'll miss Pain Suppression, but you'll have more panic buttons overall. Spec for Lightwell and you've got another heal you can hit while stunned. Do NOT spec for Revelations and you've got a second CC that is plenty long enough for you to heal up. Desperate Prayer cannot be cast while stunned but is another powerful instant. And your Renew is much more powerful.
Also, stop running off from the graveyard alone. Wait for a plate wearer to rez, then ride off with him, preferably toward the enemy flag room, where you will heal him while he carries it. Edited, Nov 22nd 2010 9:15pm by teacake