Seeing as these two are still legal in extended, I am wondering if I can get some help from some of my betters.

Ive been messing around with an extended-style Master Transmuter deck, and I run a bit of ramping in the form of the Everflowing Chalice.
Ive gone back and forth on the decision and I wonder if Etherium Sculptor would actually have more effective returns? The Chalice gives actual mana, while the sculptor provides a downgrade. Sure the chalice can be kicked multiple times, but I rarely find myself in need of that much mana before my deck goes off. And while the sculptor gives me a blocker if necessary, I would be hard pressed to give him up and lose the cost reduction, but of course extra options are always nice.
Anyhoo, any insight would be awesome.