
Scythia |

To defeat a Tarrasque?
The Tarrasque is weakened, completely suppressing it's spell resistance, turning it's regeneration into fast healing 20, and reducing it's DR to /adamantine.
The characters are all PC classed, and equipped with a +5 weapon and stat boosting/defensive gear. Assume they are fully buffed, and have time to plan. They cover a spectrum of classes, except paladin, summoner, wizard, cleric, rogue, alchemist, and monk.

Scythia |

They're not really optimized at all, although they do have excellent stat arrays.
The core group of four is a sorcerer, with a blasting and utility mix, a magus who's new to the class and the game in general, a barbarian/cavalier (dinosaur mount), and an npc dervish dancer bard (with personal buff and social spells)
With average to no optimization, do you think they could, or do you think they'd need help?

Scythia |

I made a gunslinger who could dish out 200+ damage on a full attack at level 10. The Terrasque has touch AC 5, so hitting is no problem. Give him a couple of commoners as cover and he could take out the terrasque in a round or two.
Pump him up to level 11 and it jumps to almost 400 DPR.
If it involved constant user of double barrel pistols, which with numbers like that I suspect it does, that wouldn't work (nearly as well) in this game.

Dazaras |

If it involved constant user of double barrel pistols, which with numbers like that I suspect it does, that wouldn't work (nearly as well) in this game.
True, it does involve double-barreled pistols, which many DMs rightfully nerf.
The main problem with fighting a tarrasque with level 10 characters is that you would have to defeat it fast or else you would lose many of your team. With it's attacks, swallow whole, charge, etc. you would be pretty much guaranteed of losing at least one character per round.
I mean, with some of the weaker members of the party, the tarrasque could just snipe them from hundreds of feet away with it's barrage of spines.