In my opinion, the best setup for survival is:
FRONT ROW:Empty Warrior Barbarian
BACK ROW: Empty Mage Cleric
All barbarian's stat points should be spended on strenght and all warrior's stat points should be spended in endurance.
Barbarian must intimdate in his first turn and use reckless fury in his second.This makes the warrior a tank and the barbarian a strong attacker (expect one-hit kills)
The cleric is for healing (without a cleric, you'll not go far in survival)
The mage is the less important guy in the team, althought he helps a lot
ATTACKING
-Use master strike, and in the next turn, blood strike
-I don't remeber if the baron uses enrage:if he does, save break for that hour, as the attack after enrage will most probably kill someone in one hit.If enrage is not on the gay baron's list of moves, use break before using master strike or whenever someone is in need of healing (Or, in some cases,if you are waiting the last recovery turn of reform)
HEALING:
Veradux is the great healer in battle
but if you are in danger and he is out of focus, use reform
If YOU are out of focus, use Blood Focus
Hope this helps
There may be some grammar mistakes in the text as English is not my native language
Now, to the battle strategy
Golden Rule:DO NOT LET THE PALADIN DIE!->He is the key for the victory, only him can do effective damage to the baron
Also, try not to let the Veradux die:He's important in healing the other two characters
To start the battle, use supression, so the baron can't do effective damage to you and Veradux doesn't have to waste his valuable turn in healing you, while he can save himself or the paladin
Next, use Sunder, to increase the ammount of damage your team does to the baron and decrease the amount of damage the baron does to Sonny and his allies (Veradux is very fragile)
After Using Sunder, use wound, to increase in the damage the baron your team does to the baron (again)
KILLING THE BARON
To defeat the baron with the destroyer class here's my strategy:Train until level 13
Your abilities should be:
Supression
Master Strike
Blood Strike
Reform
Sunder
Wound
Break
Blood Focus
Try to balance your stats so the speed is 2/3 of the strenght and the vitality
Put Cannibal's Hunger(sword) in Sonny (You didn't sell it, did you?)
 "Monsters' Den: Book of Dread"){kind=icon}
 "Sonny"){kind=icon}