About mages and t6

Hi, my name is Victor. I am from Ukraine, and my english isn't good, but I hope you can understand me.
I am new player on this server and have few questions.
1. What about mages in PVE? I saw, that warlocks probably better in dps. Is that true?
2. Deep arcane mages in PVP. Can I get 1800+ 2x2 with this spec on Outland?
3. What about PVE tiers? I saw in global chat, that t5 is the best tier now. When will work BT, SWP here?
Thanks for your attention.
And last small request. Give me please link to gatherer 2.4.3 for herb/mining.

1. Yes Warlocks do more DPS than mages.
2. Deep arcane (Slow-spec) is viable if you team with another burst class but it is tricky to play.
3. BT will probably come in December and SWP probably won't come until after June/July.