You can avoid stunlocks if you are actually smart. Hunters, pop a flare every now and then. Mages blink. Warlocks fear once you have the chance.
Shammies should use an insignia/medallion if they want to avoid some of the locks and they should kite it away. Also pop a poison cleansing totem to remove all those annoying poisons on you.
Druids should barkskin (I think it is useable even in shapeshift forms now [it was always useable in moonkin form though because it is a balance spell]). Death knights, I have no idea because I've never had one. xP Warriors melee pretty much so yeah. It is pretty tough for priests. They should instantly put on an absorb and heal once they can. Paladins would probably just survive through the thing. I've never really seen a rogue beat a pally, I think. But a smart rogue could probably.
I would carry around an insignia/medallion until I find something better. But I think the insignia/medallion is awesome for pvp. Enh shammies may have it a little tough, but I'd shaministic rage and maybe feral spirits. Then I'd let the pets do the work and I'd heal meanwhile or something...
Ele shammies should thunderstorm once they get the chance to send the rogue back a whopping 20 yards. (really fun to do
) and if you love PvP I would spec in
Astral Shift to reduce the dps quite well. Resto's should have an earth shield on them and they should kite and run a lot.
It is fun attacking rogues though, I have like 5k health on my 59 enh shammy and I can kill a lot of classes with ease, even though I am not really a twink.
(I don't have a 70 main, that char is my main. I decided to bg before my subscription expired)
Lol these are just my noobish opinions. They are pretty obvious but some people are too stupid to realize that they should use them. Some twinks think they can just dps stuff to death, but if you don't even use your abilities well, you will die a lot. Especially once your reach 70 (or 80 later on)