Normally I wouldn't waste time posting personal triumphs, and I realize many, many, many players have already achieved this goal, but for me it was so damn frustrating getting a Vanq to a level competent enough to survive Zealot's and other one-shot monstrosities I figured I owed it to myself.
My Vanq ended up being 47 before I finished off the main quest, but I figured since I had no plans to continue playing her after that and I seriously didn't want to fail in my mission, I might as well level her as far as I could patiently do so and still leave some amount of potential to fail. Well, outside of 2+ zealots simultaneously nuking her with lightning attacks there wasn't much chance of her dying unless I did something incredibly stupid. With her Electric Resist at 544 when buffed Zealots drained about 15% of her health if they managed to drain any, with their nuke. Ordrak himself caused little damage, occasionally when casting minions the game would force her to run up (a very annoying and potential game ending bug) and he would hit her with his cold attack for about 15% of her health from time to time.
Spells at end game:
Vanq: Haste 6, Elemental Protection 6, Zombies 6, Blood Skeletons
Pet: Frost 6, Zombies 6
Skills:
Marksman - Ranged Weapon Expertise 10, Critical Strikes 10, Adventurer 6, Explosive Shot 10, Block and Parry 10
Rogue - Armor Expertise 10, Defensive Spell Mastery 10, Hamstring 1 (never used)
Arbiter - Flechette Trap 9, Advanced Spell Casting 1 (not really necessary)
Blocking: 32%
Next up: My Minion Mancer Alch, currently lvl 22.
