Necromancers "are terrible in groups"

[Sancta]

Honestly he probably meant "compared to the other classes for a group that wants to maximize exp".

Unless the necro is charming, it is bottom tier for a group that wants to maximize exp per hour. But in that same vein so is bard/rng/war/pal/sk/dru/wiz/clr. Are those classes useless? Not at all, you can still make a decent exp group with bottom tier exp per hour classes and the exp would be fine. (As fine as a group with 5+ can be, which is low exp per hour group since 5+ is awful exp and is for funsies anyway)

To put it another way, if you were duoing say monk/sham, what third class would you want to max exp? There would be a tier list that would go something like:

1) Chanter [has to charm] / Necro [has to charm]
2) Rogue
3) doesn't matter b/c it will only suck up the exp and we'll be making less per hour

Same with Enc/Clr, which 3rd would you want to max exp? Prolly only another chanter/necro charming for dps, anything else will lower your rate. You can extrapolate this idea to 3mans+.

If you're not trying to maximize exp per hour, go nuts, invite 6 people of any class, and socialize your little heart out.