Jurri, do you have eyes everywhere? 
 
I got him, but I still suffered heavy losses and had to retreat from the field, leaving my WatchTower besieged by a bunch of savage Jaguars.  And Boron can just raise him again with little effort using his mass of priests.  But it is better without Ratte-face around for a turn or two at least 
 
Does anyone know off-hand if clams and the other gem hoarding items were increased in cost or paths in Zen's item mod?  I heard he got rid of the Blood Thorn as a useful weapon and made the Wraith Sword a situational weapon in an attempt to encourage the use of a variety of weapons.  Variety is good.
I know I tried a little variety by summoning some Horned Serpents in the early game.  Didn't work particularly well, but maybe I didn't use them in the right situation.  I think CUnknown has some Iron Pigs with him.  I'll have to look those up.