Whith 3sensei and locket of yesterday (arteficer's intuition can fetch all of them) you can go for infinite spells and kill with brainfreeze....
Hmm how many cards does that take? 3 Tops, Locket, AI, and Brainfreeze= 6 cards. But wait, there's more...
Your best case scenario is discarding the first Top(to make locket work) to AI and then you still need to discard 3 more artifacts to fetch out the remaining pieces.
So that's a 9 card combo?? 10 if you had to discard something else to get that first Top. Yikes. I would rather use Intuition in that situation and get to use AK, which I feel is underrated.
Locket+Chromatic Spheres/Stars is also an option for AI, but there are surely better draw engines in Vintage.
If AI was like Survival of the Fittest with no restrictions on what type of artifact you could get then it would be awesome. The more I think about it AI just seems underwhelming, but good luck.