These would go great with the deck, but I have a silly thing about not mixing Modern and Pre-Modern cards.
Well, you can do what you want, but that distinction is totally fake. There was nothing about the card frame changes that was meant to make cards from before Eighth Edition "Pre-Modern." Cards from before the changes were mixed with cards from after the changes freely and universally at the time. It wasn't until nine years later that Wizards created Modern, and that was around the same time they strengthened their reprint policy amid popular support for the dissolution of the Reserved List. Perhaps no one outside the company really knows why they did this, but they did. That's why we've now got "Think of the collectors!" as the unspoken first rule of all Magic: the Gathering products. That's why they practically apologized for making Reverberate, of all things. That's why Revised dual lands, which used to be such staples that they made an exemption on their rotation out of Extended, are overtaking just about everything in secondary market price. It's why Force of Will is $80 and might as well not exist as far as most casual players are concerned. It was a staple uncommon when this site started, going for maybe $1 or so. Cards that had no real collector's value for years and years have skyrocketed in price, and Wizards of the Coast switched from wanting to address the problem in 2010 to valuing the precious feelings of "collectors" that might get offended at the drop in value of their investment. From For nine years after "Modern" cards were first printed, there was nothing special about, say, Dream's Grip, that would make it perpetually a "new" card while Snap was perpetually "old." The concept was created retroactively, so that Wizards of the Coast could have a convenient way to throw half of the game's history in the trash and slap a "Eternal" sticker on it.
That's quite a tangent, but I have a silly thing about loathing this crap.
Vendilion, Snapcaster - Fine cards, but more than I want to spend. And Snapcaster is so good he'd be used elsewhere.
Yeah, I realized after I'd thrown them out there that my Vendilion Cliques were in with my expensive cards, so I thought I'd check those, but I mentioned them anyway on the chance that you might already own them. Sadly, Modern Masters didn't do anything to make Vendilion Cliques more accessible because of its small print run.
Venser, Shaper Savant; Isochron Scepter - Great cards, a tad pricey but I'd be willing to spring for them. I'm torn with these because I'm not sure if I'd be using them to their full potential (does putting Boomerang on Isochron Scepter cost me any style points?).
Venser has gotten up there, yeah. Isochron Scepter can still be had for a few dollars in some places, although that might change if it picks up steam in Modern tournaments.
Blade Splicer, Lavinia of the Tenth, Terminus - Good cards, but they don't gel much with the denial theme. I'm putting a lot of resources into stopping anything that will be problematic before it hits the field.
With no countermagic, that is pretty much guaranteed not to always work. Most opponents aren't realistically going to be Meddling Maged to death.
Also, are you confusing Peek and Telepathy? Telepathy is global enchantment, costs U, and makes all opponents play with hands revealed. Peek, a nonpermanent, is about the same as Gitaxian Probe, save namely for the Phyrexian pay-life-for-mana-cost thing. I definitely understand the value in the cantrip, and I utter profanities every time I draw a useless second Telepathy, but it's very important that I see opponents' hands early and/or often for denial.
I most certainly am not! Look, Telepathy sucks. There, I said it. Telepathy is a bad card. Yeah, you want to see people's hands and I get that, but it's an enchantment that does absolutely nothing else. Of course you hate drawing a second one: you're investing a card slot in seeing people's hands with no outside benefit and you have three more chances to draw into more hand-seeing.
Edit: Hey, so later I was looking for something else, but I got sidetracked and started thinking about the way that this deck would use Meddling Mage and friends to block opposing spells, and how that might hold up, theoretically. I've seen Meddling Mage in action a lot over the years, but not generally used in this way. So because you're able to reselect named cards for Pikula and for Council of the Absolute, I'm wondering if it might be worth it to have something that lets you see your opponent's library. Knowing what's in your opponent's hand is also useful, but there's always the possibility that they'll topdeck something that's a bigger threat and immediately play it. There are a lot of cards that would let you see your opponent's library so as to plan further ahead. Not sure if any of them would be valuable here, but it's something to consider, perhaps.