Verdict being uncounterable is much better than banking mana on Doomskar. Verdict's uncounterable clause has saved me in many many games over different UWx control decks. When you need a board wipe, you need it to resolve.

For 4 Timeless I think you need 6-7 fetchable Plains, so it was just a matter of Plains count. I've never felt comfortable supporting 4 Timeless outside of monowhite. Even with 3 Timeless & 5 Plains, sometimes you run out of Plains and can only hardcast.

You could try out Moonsnare and Thran Turbines. Currency Converter's card selection smooths some variance.