If either one is broken, it's Grimgrin's Analysis. I think Grimgrin's would be one of the best few draw spells in the game. Instant speed and the flexibility of splitting up the cost are big advantages, and the baseline of Foresee is almost good. Paying for the scry first is really good, because you can use it to dig deep for a wrath/bomb in the early game and then flash it back later for the raw card advantage when that's what you need in the late game. I might rank it below the delve draw depending on my deck, but it would be close. Still probably reasonable for a multicolor cube card, but it's going to be a very high pick.
Noxious Tutor is fine. At least, I'd consider it significantly worse than Vampiric Tutor if you're already in BG.