In a competitive environment, I'd probably play Chalice at 1 (most of the times, you'll get to 4 mana too late anyway) and Prelate at 2.
In a more casual environment, I won't play Chalice at all. I won't probably play Prelate either (it's quite on the "mean" side of the spectrum, to me), but if I do, I'll probably choose 3. It depends on the removals I expect to encounter, though.