Currently you have to turn on long cooldowns for them to be tracked and Death Coil will start turned off.
You can manually change this by opening config.lua in notepad and just changing "LongCD's = false" to "LongCD's = true" without quotation marks.
Death Coil can be added by removing the -- before the spell to look like:
-- Death Coil . Unholy
self:NewSpell({
spellID = 49194,
debuff = true, -- 49194
dot = 1,
requiredTalent = {3,14},
})