Druid vs Necro - which one do you want in your group?

[Estu]

Druids bring the following to the table:
- Heals
- Snares
- Buffs (DS, HP+AC, Strength, Regen)
- Pulling help in outdoor zones (harmony is great)

Necros bring the following:
- DPS (pet DPS is meh, charmed DPS is great)
- Heals/twitches (these are not amazing IMO; people will talk up twitching a lot but a second healer is probably more effective than a twitcher)
- Snares

I'd say the druid is a better groupmate overall. A necro with a charmed undead pet would overtake the druid in usefulness though.