Burning Legion

Hands down the easiest faction to play as, but not quite the easiest to win as. You have a double safety net on your dreadlords - Astral Walk and Dark Summoning. The most dangerous thing to your dreadlords is detection - so if you're unsure if an area is safe or not use a shade to determine if they have detection in that area. If purple goes New Dalaran watch out for Tirisfal Agents - their damage is not negligible. Keep a watchful eye on the Forsaken as they are very likely to betray you. Your main target will be the Book of Medivh - which starts on Kel'Thuzzad. Try to keep an eye out for when it changes hands.