MTG Salvation

So with the recent bannings of summer bloom and splinter twin I have been play testing U/W tron against the top 5 decks in modern hand having some pretty good success. I would like some input on the deck as there are some things i need some outside opinions on. Here is the current list I am running.

land
4 Urza's Power Plant
4 Urza's Tower
4 Urza's Mine
3 Seachrome Coast
1 Academy Ruins
1 Island
1 Plains
2 Ghost Quarter
1 Eye of Ugin
1 Mirrorpool
1 Urborg, Tomb of Yawgmoth

Spells
4 Expedition Map
4 Path to Exile
1 Oblivion Stone
1 Sphinx's Revelation
3 Azorius Signet
3 Thirst for Knowledge
1 Unburial Rites
2 Gifts Ungiven
2 Ugin, the Spirit Dragon
3 Timely Reinforcements
2 Repeal
4 Remand

creatures
1 Kozilek, Butcher of Truth
1 Ulamog, the Ceaseless Hunger
1 Wurmcoil Engine
2 Snapcaster Mage
1 Iona, Shield of Emeria
1 Elesh Norn, Grand Cenobite



The cards im not for sure set on are and the possible replacements are as follows

remand vs condescend
snapcaster mage vs spellskite
mirrorpool vs 4th seachrome coast

Any weigh in on the adjustments or some other options or opinions are always welcome. Biggest one I am torn on is the Remand VS Condescend so i will add a poll to see what you guys and gals think.

Thanks for looking.

Im going for consistentsy. Other tron players convinced me karn is a must have but they play r/g ton for the most part. so thats why i was asking for outside my community opinions. Also thanks for the article link. very helpful

Hello I have been playing magic for over 15 years and I have recently been trying out tron decks for modern. I see how good Karn Liberated is in the g/r builds but he seems to not do enough in the mono blue or u/g tron builds. I have been experimenting with a u/g tron build but I dont know if karn is good enough to run in that version. I seem to side board him out in half of my match ups, mostly against twin and burn decks which seem to be most of the meta at the tournaments I go to. Just wanted to get some outside opinions.