[NATURAL_SKILL:DODGING:48]
Makes you, for all intents and purposes, unkillable, if only because nothing can hit you. Combine with a cheat reaction to give you 100 adamantine shields, grab a weapon of your choice, and you're pretty much set. Be careful of falling objects, though, as I once killed a Namekian (I'm using the DBZ mod) who was flying over me, and his items fell on me and killed me (though I think that was a fluke).
For more brokenness, put these in too:
[PHYS_ATT_RANGE:STRENGTH:5000:5000:5000:5000:5000:5000:5000]
[PHYS_ATT_RANGE:TOUGHNESS:5000:5000:5000:5000:5000:5000:5000]
[PHYS_ATT_RANGE:AGILITY:5000:5000:5000:5000:5000:5000:5000]
[PHYS_ATT_RANGE:ENDURANCE:5000:5000:5000:5000:5000:5000:5000]
[PHYS_ATT_RANGE:RECUPERATION:5000:5000:5000:5000:5000:5000:5000]
[PHYS_ATT_RANGE:DISEASE_RESISTANCE:5000:5000:5000:5000:5000:5000:5000]
[MENT_ATT_RANGE:FOCUS:5000:5000:5000:5000:5000:5000:5000]
[MENT_ATT_RANGE:WILLPOWER:5000:5000:5000:5000:5000:5000:5000]
[MENT_ATT_RANGE:MEMORY:5000:5000:5000:5000:5000:5000:5000]
[MENT_ATT_RANGE:SPATIAL_SENSE:5000:5000:5000:5000:5000:5000:5000]
[MENT_ATT_RANGE:KINESTHETIC_SENSE:5000:5000:5000:5000:5000:5000:5000]
This'll max all your attributes from the start. Very useful. You also might consider giving your special caste of humans (or whatever) some interactions like the dragon's fire breath, or the fire imp's fireball. I also find that the "Ki Blast" interaction from the DBZ mod can be really, really deadly if you set the number of targets to 10 or more.
If you find yourself getting overwhelmed by enemies that are way faster than you, put this in as well:
[SPEED:0]
Really, addy skin is overrated IMO, as just putting in a few of these makes your character all but unkillable in adventure mode. Oh, almost forgot, if you're tired of having to eat, sleep, and drink, put in the [NO_EAT] [NO_DRINK] and [NO_SLEEP] tags.
I think that pretty much covers all the important stuff for making an adventurer boringly overpowered. If you still find yourself losing with these on, uninstall any mods you have and seek help. Not medical help, mind you, but gameplay help. Because I find it really, really hard to die, even when I try to with these on.