Given what you wrote of the party, the Druid is the fighter of the party.
The other two are a Sorcerer and a Wizard who have a little bit of some other class. They are mostly arcane spellcasters, regardless of their attributes.
You might make him have to act like a front line fighter. Give him a situation where he has to protect the mages long enough for them to do something. The Improved Invisibility is an idea if the Druid doesn't have Wolf companions.
If the rogue/sorcerer is the type to mix it up in melee, you might have him look at the Dragon Disciple PrC in T&B. It would improve his combat abilities.
If the fighter/wizard is the type to mix it up in melee, you migth want to point out the SpellBlade PrC in T&B. This is basically a Fi/Wiz multiclass who can wear armor.
By the way, who is casting that haste on the druid? If the druid wasn't doing a good job of protecting me, I would start using the haste spell on myself instead. A hasted sorcerer can dump a lot of spells in a short time.
The other two are a Sorcerer and a Wizard who have a little bit of some other class. They are mostly arcane spellcasters, regardless of their attributes.
You might make him have to act like a front line fighter. Give him a situation where he has to protect the mages long enough for them to do something. The Improved Invisibility is an idea if the Druid doesn't have Wolf companions.
If the rogue/sorcerer is the type to mix it up in melee, you might have him look at the Dragon Disciple PrC in T&B. It would improve his combat abilities.
If the fighter/wizard is the type to mix it up in melee, you migth want to point out the SpellBlade PrC in T&B. This is basically a Fi/Wiz multiclass who can wear armor.
By the way, who is casting that haste on the druid? If the druid wasn't doing a good job of protecting me, I would start using the haste spell on myself instead. A hasted sorcerer can dump a lot of spells in a short time.