Which zone should I make a leveling guide for next?

[Rygar]

Voting Najena.

Fun fact, original EQ dev team says it is pronounced 'Nah-Jehn-ah' or some such thing. Pronouncing it that way in my head made me want to go there more than 'Naj-een-ah' (too close to Vajena).

Really could be a popular zone:
1) Vendors outside in Lavastorm which also have Bandages and other supplies
2) Druid ring right outside to beg for noob rides or port outs
3) Neriak right nearby, wine quest awareness can let most people bank there safely
4) EC <5min run... beg for buffs if are a loser or if you want to buy some upgrades
5) Undead and Elementals make good use of situational spells
6) Filthy Dark Elf blood can be spilled there... learn from this so you can eventually cut your ties with Neriak and launch an invasion for the glory of Rivervale

There, I wrote your intro for you.