What guilds are good on the blue server?

[loramin]

You definitely don't need halfling guards to solo as a cleric. At the earlier levels you can do Lake Rathe (undead gnolls) at night, and Rather Mountains (dry bone skeletons at the tower), and at 27 you can switch to Tower of Frozen Shadow in Velious.

That being said, it's unfortunate that you felt the need to solo as a cleric; when I did it, it was deliberately for the challenge of soloing a hard to solo class. If any class should be able to group to 60, it's cleric.