Nail said:
Sounds like I need to be in your game.
Maybe
But even as a DM, and one that can optimize with the best of 'em, classed NPCs are typically much less of a threat for the CR. ...We are talking CR = APL, right? Your example of two 7th and one 8th level halflings calculates out to a EL 11....
Two 7th lvl and one 8th lvl NPCs equals out to EL 10-11, which is an encounter three 11th lvl PCs should win handily. And I don't think they were at all weak for their CR, and would rank pretty well with, for example, two hill giants (CR 7) and one stone giant (CR 8) from the MM, a very melee-focused encounter.
were there any other factors you're not telling us?
Yes. For example:
* The PCs have the equivalent of about 40 point buy
* All three PCs have permanent +4 enhancement bonuses to three stats of their choosing
* I have house rules allowing one druid to benefit from multiple magic items in her wildshaped form of a brown bear
* The other druid is using the UA variants of the Aspect of Nature and the Druidic Avenger, is using a Monk's Belt to get major AC bonuses, and has the Hexer PrC from 3.0, so he has Greater Mage Armor and Greater Heroism as his arcane spells (both of which he cast while preparing for the duel)
* The third PC has a sentient Holy sword which alone is worth over 60,000 gp and has the smiting ability of an 8th lvl paladin and the spellcasting of a 7th lvl cleric
* I use the Spontaneous Metamagic 3/day rule from UA, which means the druids (both have Quicken Spell) were taking full attacks (or casting spells) and casting Quickened 1st or 2nd lvl spells at the same time without using a higher level slot
I think those are the main factors that come to mind
