Hunter, Mage, Warrior, and Paladin
(marks) (frost) (arms) (ret)
Battlegrounds are entered at every level divisible by 10; the last Battleground accessible in a bracket ends with level X9, so level 10-19, 20-29, 30-39 and so on.
There is no 'BEST' class in wow. Each class has its strengths and weaknesses and can be overcome by another player who is better.
WG means Wintergrasp, a zone in Northrend where PVP happens a lot, and a battleground that happens every 2 hours.
A witch but that is not a class in WoW.
In the online game, World of Warcraft or WoW, there is one class that can use a spell called hex. That class is a shaman, characterized by their versatility, healer/dps status, and mail armor.
Mage
There really is no answer to this as you are the only person that knows what race and class you want to be.
Like Crazy, Like wow, class of 2016 is got it now!.
It all depends on which class you play and what spec you are.
It's a secret unlock somewhere in Ahn'qiraj.
the T10 class gear
Priests due to the fact that they have cloth armor.