new entry "Goblins_Tank_A"
type "Character"
using "_GoblinFighter"
data "Armor" "5"
data "Sight" "1"
data "PiercingResistance" "-25"
data "SlashingResistance" "50"
data "ShadowResistance" "50"
data "Blackrock" "1"
data "BodyBuilding" "1"
data "Willpower" "1"
data "Flags" "StunImmunity"
data "Talents" "AttackOfOpportunity"

I tried adding various amounts of extra vitality, 10-1000 just for test purposes, to this and other various Goblin related entries. I didn't see any change in stats. At some point I got really extreme and tried adding it to every entry. I also tried modifying armor but also no effect. I'm modding a mod. The Four Player Character Creation one to be precise. I used GR2 converter to extract and repack the files so I could be editing their character.txt. Out of desperation I tried editing weapon.txt to modify their stats since you can apply plenty of stat bonuses and penalties and had success.