Pielorinho
Iron Fist of Pelor
Anubis said:None of you can give any way for low-level parties to do that and live to tell about it. Most parties couldn't get past even one much less several. Try using a standard party and standard situations and then you'll see.
This thing is simply CR 41/EL 22. You're gonna be Level 40 before you can take these things on at any normal rate.
Of course we can. In fact, I already gave you a party that could take this thing on without any problem -- the party that we're going through RttTemple of Elemental Evil with, in fact. Our four 9th- and 10th-level characters could take on colossal scorpions until the cows came home, as long as we could confront them outdoors and one at a time.
How would we likely do it?
1) Druid wildshapes into a hawk and high-tails it out of range.
2) Dwarven cleric takes to the air with his wings of flying, and begins using a sling.
3) Sorcerer casts fly on herself and then on monk.
4) Monk runs away until fly gets cast on him; then he starts pegging the scorpion with arrows.
5) Druid, in hawk shape, retrieves arrows that have been fired and brings them back to the monk.
As you can see, our only real limitation on fighting these scorpions would be running out of arrows. With the monk doing about 12-13 points of damage with each arrow, it'd take about two quivers to kill a scorpion. We carry extra quivers around in a Heward's Handy Haversack; between these extra quivers and the retrieval of arrows by the druid, we shouldn't have any trouble at all.
Resources used:
-Arrows
-Sling bullets
-2 3rd-level spells
-1 wildshape
Not close to 25% of our resources. No hit points used, no potions/scrolls/charged items used, only two spells used from our arsenal of around two or three dozen spells, and one special ability.
Of course, this assumes that we only found out we'd be fighting scorpions a couple rounds before they showed up. If we knew we'd be hunting them, we'd be more efficient.

Compare your CR of 41

I think you're way off in your estimate, because you're not factoring in the average party's ability to make ranged attacks from the air and the scorpion's total inability to deal with this tactic.
Daniel