Nostalrius Begins - Quality wow vanilla realm (1.12)

which class/spec is most frequently wanted?
is there a class/spec for instant spot?
i mean, which class has the least competition to get in a raid.

i guess fury warriors/rogues/mages are a dime a dozen.

1. Healers of any kind are always welcome. Warlocks are the least played DPS class, so it's not going to be hard to get in raiding environment as one.
2. Yes, Dwarf Priests get an instant spot.
3. Druids are the least played, so the competition for druid class gear is almost non-existent.