I've thought a lot about this since the Dig ban, for both UR and Grixis. Predict is the only thing I can think of that can generate the same amount of raw card advantage at instant speed for an affordable cost, but is obviously conditional. Magmatic Insight is another option, probably somewhat stronger if you're playing Daze. Painful Truths and Read the Bones are both somewhat playable if you splash black, as are Night's Whisper and Skeletal Scrying, but none of them are particularly attractive. Ancestral Vision requires very little mana investment but does require a time investment, which doesn't strike me as something this deck wants to deal with. Deep Analysis is powerful but doesn't synergize well with the deck since there aren't a lot of discard outlets.
If somebody knows something better, feel free to share.
EDIT: I just noticed something about Eli's list: we seem to be on a lot of the same wavelengths.
- I said I didn't like Chain Lightning. Zero Chain Lightnings in his list.
- I said I didn't like PoP because Wasteland was too essential. Zero PoPs, 4 Wastelands.
- I said I didn't like Snapcaster. Zero Snapcasters.
- I said I didn't like my only counters being Force of Will. He played Daze, and even Pyroblast, main.
- I suggested Delve spells. He's got a Set Adrift in the side.
- I suggested card draw of some kind. He went with Compulsive Research, which seemed to work out alright for him.
And to keep things fair, the points he didn't align with:
- Didn't change the Swiftspear count. I'm not surprised about this one. It's not a card you can cut or decrease the count of. This point was more of an observation of something I didn't like about the deck.
- No Mizzium Skin.
- No evasion-granting effects.
Suffice it to say, I approve.
Also, I'm not sure what he played against, but that Top 8 is just a Greatest Hits list of terrible matchups. Lands, Miracles, Aggro Loam, and Death and Taxes. All of them mediocre-to-bad; Lands is probably the best matchup, followed by Aggro Loam, which is saying something. This is fairly representative of my local metagame, with the exception that there is a conspicuous absence of Storm, which probably were ground out in the middle rounds of Swiss, along with the Delver decks that ran into these buzzsaws. My decision to move on from this deck is probably influenced by this metagame composition.