Since we're supposed to have worked together before, we ought to figure out how we handle splitting up buffs, and what we're about in a fight.
If curious as to how Lysander got a 22 Con as a human with no items that I noticed boosting it. Does he need an Endurance or not? I assume that Rex and Darian can boost their own stats, if need be. William has +2 from an item, making a Bull's Strength a rather poor choice.
Verra and Rex each have ways of making weapons +3. Of our main combatants, I assume Verra will zap his own stuff, or at least his own arrows. Rex has a +2 weapon, Bellus has +1 weapons, and William has +2 weapons.
Verra and Darian have Haste. Since Verra doesn't have to worry about preparing enough Hastes in advance, I reccomend that you talk to him for all your Haste needs.

Actually, our fighter types use 2 weapons, so extra attack isn't that much of an advantage if battle is already joined. However, if they have to close, they'll be much less effective without haste in the first round, since they need full attack actions. I think it's usually good to haste clerics too, since they can bash people and cast spells at the same time that way.
Darian is capable of casting Gird the Warrior, which adds a +10 armor bonus to AC and a +4 enhancement bonus to attack and damage. Since Bellus has light armor, and weak weapons, I think this spell would help him the most.