Is there a specific strategy every one would like to use going into this skill challenge. Looks like William and Paranthraxus are the only two trained in Diplomacy so they could have them to all the talking, while Argivion and Nerve provide all the info with Nature and History checks. The Paladin and Warlord would also bluff but their bonus to diplomacy is almost double their bluff.
There really isn't a need for a strat tho I guess we could just do it off the cuff.