I use this as a reference:
http://everquest.allakhazam.com/wiki...gression_guide
Really, just try with however many bots you have and adjust your strategy accordingly.
Try Chardok, Western Wastes Dragons, Kael and see how you do. Look for named mobs in harder areas, such as Grieg's End. You may not be able to take Grieg to begin, but try out any of the named in the zone. Kael isn't great until you can take out Derakor or AoW.
When I really began raiding, I started hitting Akheva Ruins (Itraer.. Shei's DT sucks), Greig's, then Chardok B for Korucust (one of my favorites.. quick to get into and out of and good loot for my Mage). Then I moved to Ssra, then Vex Thal. You may not take out the boss of the zones, but running Ssra, and hitting the Rhags, High Priest, Arch Lich, Creator will get you a lot of loot.
I tried to work through the progression of expansions if I could, so I waited for PoP bosses, where PoI, PoS, PoN could get you decent loot. BoT, PoT, PoNB, and a couple others preEPs.
Just beware some encounters are difficult if not impossible if it's just you with your bots.. Manaetic Behemoth for one.