Tough choice
Firkrag i just cast gate, let the pit fiend take to brunt, and pounded the hell outa him with celestial,blade of roses.
kagnaxx i just used a wizard eye and did much the same thing except i used the holy avenger.
So the "who is harder" question brings up much debate
so ill take a average brand new level 7 party of 1 paladin,1sorc,1cleric,1thief,1ranger,and 1 fighter/mage for good measure
Do the math and i say JESUS CHRIST PEOPLE IS IT NOT ENOUGH THAT THEY ARE BOTH HARD! I MEAN COMON IF YOU COULD NOT EXPLOIT THIER STUPID AI AND THEY COULD ACTUALLY MAKE REAL DECISONS THIS WOULD NOT EVEN BE AND ARGUEMENT,KNOW WHY? CAUSE NO ONE WOULD HAVE EVER BEATEN EITHER ONE OF THEM, OR SURVIVED THE BATTLE TO TELL ABOUT IT!
But anyway, i say firekragg is harder, it only takes one wizard eye to destroy kagnaxx.

Hehe