I want to copy 5 class for heroic in northrend witch class I should choose?

[Mateusz]

I want to copy 5 class for heroic instances in northrend witch class I should choose?

I know that people can do this with shaman, but any other class copy by 5 is able to do instances in heroic mode?

[Khatovar]

Start by reading. There's an entire section on this forum dedicated to group composition called Multiboxing Group Composition Discussion (http://www.dual-boxing.com/forumdisplay.php?f=31)