The effect of Illusions of Grandeur is pretty simple -- you gain 20 life as long as the enchantment is in play, but you lose it when it's gone, because it's an illusion after all
I believe for the most part, adding these is relatively safe
The only card that doesnt synergize perfectly with the rest of the deck is Thalias Lieutenant, but even that card makes sense given how many Humans there are (and the fact that Worthy Knight generates Human tokens, not Knights!) Theres no denying the fact that white is underpowered in Pioneer due to the lack of good removal, but with History of Benalia, the right weekend could come along to make this deck a real contender
Tutors: Transmute Artifact, Gamble, Mystical Tutor, Personal Tutor Ramp: Mana Crypt, Solemn Simulacrum, Thran Dynamo, Gilded Lotus, Mana Vault, Grim Monolith, Basalt Monolith, Voltaic Key, Coalition Relic Disruption: Force of Will, Mana Drain, Counterflux, Vandalblast, Blasphemous Act, Pongify, Rapid Hybridization, Cyclonic Rift Draw: Rhystic Study, Recurring Insight, Consecrated Sphinx Utility: Lightning Greaves, Ral Zarek, Time Stretch, Dack Fayden, Sensei's Divining Top Lands: Academy Ruins, Strip Mine, [Reliquary Tower]], Command Tower, Sulfur Falls, Steam Vents, Shivan Reef, Desolate Lighthouse, Cascade Bluffs, Scalding Tarn, Volcanic Island, Minamo, School at Water's Edge, Ancient Tomb, Myriad Landscape If you're mad enough to fully bling out a Coin Flip deck, then here's a list for you to ponder: Next One's A Secret
This card has always been one of my favorites
