Necro soloing

[Aaramis]

At 20+, my suggestions would be:
- Upper Guk - whatever cons blue
- SK aviaks
- Highpass Hold - gnolls or orcs, you choose. Both should be blue. Get yourself some magic items
- EK crag spiders - time to level tailoring!
- Oasis - deepwater caimans / crocs should be blue. Orc alley an option too.
- Unrest - upstairs and/or floor level
- Mistmoore - entrance mobs I think are doable
- OoT - gargoyles

Those are just off the top of my head. If bored of soloing, find a duo partner. A Rogue alone will double your kill speed, and be great for your mana as you only need to snare + fear, then sit to med as your pet and the Rogue kill it.
Druid I find works well too. He snares and DoTs - you throw a non-snare DoT on and sic pet. /win.