CoM was changed about a year - 18 months ago, since then there have been some minor changes (iksar quest mobs added), and exp possibly slightly increased for hot spots. Compared to 2 years ago, mobs are slightly higher, there are fewer undead, most areas don't mix live and undead, and nameds are now random spawns anywhere.
There are several clear camps in CoM; I'd probably start with the stables, move to the temple (the area on the north wall opposite the stables), then the goo house, depending on how it goes.