2 New players.

[godbox]

Necro/magi is pretty good because you can just fear kite and just let pets handle shit without losing exp
(you need to do 1 point of damage to a mob while grouped or else pet eats most of the exp OR do 51% of the damage solo OR kill the pet at the last second and finish solo)
Magi is not super gear dependent since they just sit on there butt and med in between chain summon
mage heals are not worth while if i recall its always more efficient to just summon a new pet and dismiss the old one at the last second.
of course the necro has alot of utility spells that are life savers the mage doenst have so magi will have alot more deaths and CR when things get weird
the bonus is that a necro / magi either one can solo super fine since I am like 95% sure your friend is not gonna make it to lvl 20 if she didnt play old school eq herself