[Nightblade]

The mantra typically is:

If it can be kited or there's charmable undead nearby : necromancers can kill it
If it can be rooted/slowed : shamans can kill it.

The necromancer epic is fairly involved though, with the revamps to the planes is less of a pain in the butt than it used to be.

The shaman epic is mostly about faction, and a few fights that'll require friends. The hardest part is, really, just showing up to Plane of Fear to cave some Golem faces in with the hopes of an Iksar child's tear. Otherwise, if you can run from A to B, you can complete it eventually.

In the case of a necromancer, definitely go Iksar if you want to maximize your capabilities to recover from fights. For shaman, it really depends on what aesthetic you want. Do you want to be unstunnable from the front? Ogre. You want to be redonkahuge and have regen on the main continent without almost everyone hating you? Troll. You want to be on an entirely DIFFERENT continent, have everyone basically want to stomp your teeth in, but get regen? Iksar.