Dak'kon Zerth Blade is bought from a bonus merchant, the same one that sells the Robe of Vecna.
Let's try Paladin...
PS: Red Dragon Scale Armour + Ring of Protection +2 is a bug and has been corrected in ToB, so I will not use that.
Armour of the Hart: -2 AC
18 DEX: -6 AC
Helm of Balduran: -7 AC
Dak'kon's Zerth Blade: -8 AC
Sentinal Shield: -13 AC
Cloak of the Sewers: -14 AC
Ring of Earth Control: -15 AC
Ring of Gaxx: -17 AC
?!?!
?!?!