Hi, my guild has been doing MH (4/5, Archi 22%) and BT (3/9) for a month now. Like all other mages in my guild I'm specced 2/48/11. But, after reading some tactics (mostly for Illidan) I think it would be nice to try something else and give myself more utility. That being said I have come up with this spec: http://www.wowhead.com/?talent=oi0ic0czxIziZZVA0cs00o
The reason I have put 3/3 in Imp. Blizzard is because I think the Chill would work pretty nicely on MH trash, giving tanks more time to grab a "loose" mob and it will be really nice when we come Illidan.
With this spec I will have a lot of mana (and decent mana reg) and the spells I will be using (3xAB, Frostbolt) don't cost much and, thus, I won't have mana problems on long and exhausting fights (Azgalor e.g.).
Your points of view are more then welcome