Whats RDW?
And Sigil >>> Luminarch, works loads better, have never come across anyone who naturalises, so they both stay on the table, whereas sigil comes in turn 5 and starts working right away, luminarch comes in at 2 at best and doesnt work til 6 if you meet its more demanding criteria.
Okay, here is what you do:
4x Luminarch Ascension
4x Path to
Exile4x Day of Judegment
4x Angelsong
4x
Safe Passage4x Oblivion Ring
4x Journey to Nowhere
4x Sigil of the Empty Throne
24 Plains
Stall til you get preferably Luminarch online, or possible Sigil, then pump out 4/4s and
exile their creatures. In a slower meta, Admonition Angel is a possibility. There is a lot of removal and prevention in this deck, you will have no trouble getting one of your two win-cons online. I would like to see another win-con, preferably admonition angel or BSA, but the deck should work fine anyways. Possible additions are Lifelink, Holy Strength, and Celestial Mantle.
Red Deck Wins = RDW. Here's a sample deck list.
Creatures:
4 Hellspark Elemental
4 #$&*@!'s Thunder
4 Ball Lightning
4 Goblin Guide
4 Plated Geopede
Spells:
3 Earthquake
3 Burst Lightning
4 Lightning Bolt
4 Searing Blaze
2 Quenchable Fire Lands:
12 Mountain
4 Teetering Peaks
4 Arid Mesa
4 Scalding Tarn
Sideboard:
4 Goblin Ruinblaster
4 Unstable Footing
3 Mark of Mutiny
2 Manabarbs
2 Quenchable Fire
Lots of creatures with haste and unearth, so you need instant speed
exile and general safety. Day of Judgement can't touch these guys, and neither can Journey to Nowhere or Oblivion Ring. Path to
Exile,
Safe Passage, and Angelsong are your only protection.
It hits hard and fast. Your deck wouldn't stand a chance. My version is much more suited to that match up, and in general the faster aggro (Jund, Naya, Boros, Vamps) rampant in the format.
And yes, Luminarch Ascension is better than Sigil. You just have to use it right, which is not too hard. Your deck fails at using it well, no offense, since you centered your deck around using the weaker one (Sigil), so Sigil seems more effective.