MF will have no effect on what base item (which TC its from) or what ilvl an item a mob drops (that is its mlvl). It is useful to note that in 1.07, the drop order is different in that it goes normal/magic/set/rare/unique ie rares are higher up the chain that sets. This is why NM Andy drops all rares for you - you've pushed her past the point where she'll only drop rares and uniques. If you lower your MF you'll get a lot more sets (IIRC 127%MF gives the best chance of sets).
Right--I was running her for uniques, but I'm out of MF gear until I find a 4os armor that I can plup ful of PTopaz that doesn't have the clvl req of 47 that my current gothic armor does. By then, I may as well just run council/Meph, as 500+ Andy runs for a SoJ drop is a little beyond my patience.
Speaking of which, what sets do you all use in 1.07, outside of IK and Sigon's? I want to eventually complete most of the sets and try them out on characters built to take advantage of them in Hell. I know that Cormallon has a Set Sept, and that sounds pretty cool to me.