Before rb, level with fire circle/inferno except when your level ends in 0, 1, 5, or 6. At those times you should use tornado on white names for bonus damage and spell experience. [img]text2schild.php?smilienummer=1&text=Old but relevant, sorry' border='0' alt='Old but relevant, sorry' />
Super moon gems help a ton if you can find them anymore, but refined moons would be ok and easily available in market.
After reborn (expecially if you rb from water to fire) just use tornado all the time while your guard zaps too. I'm water-fire and fixed nado by 117 without TG, although I used an elite +5 bs with 2 SMG. In TG I always use inferno or maybe put a noob on a stake and hit it with FoH.
ScriptVessel will work, but I think that if you're going to get any useful level experience at the same time that means you'd be in Adventure Zone, which is gonna take a heavy toll on durability for the small amount of exp you'd get. I tried that one night and wasn't pleased with the result, and repairs cost out the ***.
So I leveled my nado on devils while letting guard tank.