I think that the deck might look something like this, in order to take advantage of Ritual:
4 Goblin Charbelcher
4 Burning Wish
3 Empty the Warrens
1 Taiga
4 Land Grant
4 Lotus Petal
4 Chrome Mox
4 LED
4 Elvish Spirit Guide
4 Simian Spirit Guide
4 Rite of Flame
4 Desperate Ritual (Easier to make R than B, and you can't get threshold easily in this deck, unlike TES/FT)
4 Dark Ritual
4 Tinder Wall
4 Manamorphose
4 Wild Cantor
For a non-Ritual list, the big changes would be -4 Dark Ritual, +4 Seething Song, -4 Wild Cantor, +4 Street Wraith.
So you have 12 ways to cast a Dark Ritual in this deck. Is that enough to warrant its inclusion?

