Encounters for a deceptive PC?

[Lawmonger]

Hi all!

I'm looking for advice on building dungeon encounters for a deceptive/diplomatic character.

I'm DMing a 3.5 Eberron campaign. The party are 10th level and have just reached the giant and undead infested ruins theyve been working their way towards since 6th level.

The party rogue is a Changeling Rogue/Spymaster who specialises in Bluff, Disguise and Diplomacy and is not much of a combatant.
I'm looking on suggestions for a few dungeon encounters where she can make use of her skills so that everybody has a chance to shine.

The other party members are an Elf Ranger 10, Halfling Artificer 8/rogue 2 and a Human Sorcerer 10.

I have an idea for an encounter where the party must, through deception or diplomacy, organise a meeting between a Ghostly dragon and a powerful Allip (the former was killed by the latter) in order to secure the dragon's aid. But I'd like a few more ideas.

Any Suggestions?

[VRMH]

The real problem - and one I have no solution for - is confronting the party with a "do not kill"-enemy.

[Journ-O-LST-3]

They find another band of adventurers and must trick them into doing something dangerous/taking a different path etc?

It's a bit late but you can also toss some kind of cryptic mystery into the crawl so she has something to be keeping track of while others do the fighting.

[Ascalaphus]

Maybe the rogue could misdirect enemies - trick them into thinking they're getting sneaked up from side A, so that they send their best tank to cover side A. Meanwhile the party is attacking form side B.

[Crosswind]

Some quickies:

Meeting of evil cultists that they can infiltrate - save the human sacrifice (can be done sans killing all cultists)

Snarky talking door that they can diplomacize/trick

Really dumb set of guards.

-Cross

[Lawmonger]

Thanks guys - I can probably squeeze in a long term mystery/puzzle to deal with and the old talking door is something i hadnt considered.