I would prefer necromancer to be a melee HEALER actually. They use scythe weapons to "rip" out enemies aether and use it to heal their allies. they summon a melee ghoul to help deal damage or summon a ghost that will every so often heal like how eos does. The ghoul uses the aether you collected to do big aoe heals. The melee ghoul uses it to buff allies nearby say like a %5 dmg increase that lasts 20 seconds on a 90cd.

As much as i want necros to be a dps job, i feel its better suited for the healer role.