I'd like to hear some opinions on why 4 Phid is better than 3 Phid & 1 Cruicible please.

This is where I've come after a few days of intensive testing:
// Lands
    1 Strip Mine
    1 Library of Alexandria
    1 Tolarian Academy
    4 Wasteland
    2 Polluted Delta
    9 Island
// Creatures
    2 Tezzeret the Seeker
    3 Ophidian
// Spells
    4 Mana Drain
    4 Force of Will
    1 Mox Sapphire
    1 Black Lotus
    1 Fact or Fiction
    4 Mana Leak
    1 Time Walk
    1 Mox Ruby
    1 Trinisphere
    4 Impulse
    1 Mox Emerald
    1 Mox Pearl
    1  Mox Jet
    1 Sol Ring
    1 Ancestral Recall
    1 Time Vault
    4 Chalice of the Void
    2 Vedalken Shackles
    2 Echoing Truth
    1 Crucible of Worlds (latest addition, exchanged for 4th ophidian)
// Sideboard
SB: 4 Energy Flux
SB: 4 Propaganda
SB: 3 Sower of Temptation
SB: 4 Trickbind

Trinisphere prevents low-mana-cost ambushes and puts stress on nonworkshop mana bases, anybody else like this card in here as much as I do?

Crucible Pros
-Easy to play
-Brings back LoA/Tolarian Academy
-Waste/strip recursion
-Polluted Delta recursion

From those points it plays very well with Trinisphere and Vedalken Shackles.

Echoing Truth is GREAT against Empty the Warrens and Bridge From Below. Main decked bounce in this deck seems essential. It gave me such a relief to replace Negates with Echoing Truths.

I'll be happy to answer any questions.