The Spirit Realm

One relatively easy way to go above 24 is to get some Damage shield potions (can use Skinspikes V now & can use Skinspikes VI at 25 .. can make them on your own starting next level too) . and goto Lavastorm Mountains.
- in the southwest corner of the zone, talk to Darkpetal. She is a darkelf.
- get the "Undead" quest and the "Lavaspinners" quest from her
- goto the Lavalake up north
- on the west side are the Greater Lavaspinners, then should still be dark blue to you but will be light blue / green shortly. They are KOS but don't actually agro you until you do something to them (I have sat right next to them with low level alts and they dont agro) and I have not had social agro with them.
- on the east side are the Protectors. They come in a batch of 3 or a batch of 4 .. using the DS on yourself, you should be fine thru 3 (or root one, and get 2, then the third)

- one word of caution on the west side, there is a roaming Solusek Goblin. He can be a named Solusek Assassin sometimes and he is invis when he moves around, so you can get jumped by him.

Get "summoned" pet gear from bazaar if you can. The belt alone adds up to 850 hps to the pet. and the mask adds haste.

To help with DPS, get a high damage, cheap weapon from bazaar rather than a summoned Fist of Ixiblat. Weighty Polearm and Greatstaff of Thunder come to mind and are 100pp or less on most servers (havent checked FV recently though). The pet is not affected by level recommendations, so can do up to 58dmg or 62dmg with them. The fists have a proc, but the pet doing consistant higher damage is awesome at low level.

The undead can spawn a named mob in the 4-pack (eastern most spot of the 4). He drops items worth 95pp with CHA=107 or higher (if you dont use the items yourself).

The undead quest will easily take you to 28, can go higher but they start getting light blue / green, so easier to move on. (i have taken a mage to 30 there, necro is currently 26 and still doing the quest, chanter self solo'd there to around 31, with the help of the steadfast servant and HOT potions that I bought in POK)