Why You Shouldn't Use Fracture

[Coramac]

Non-Fracture provides you with 100% damage for 72 GCDs and 77.5% DPS for all GCDs after (net loss is 14.44, which means that you'll need to have 22.4% of your GCDs empty to keep using it; 50 / (50 + 14.44)). Fracture provides 103.3% damage for 60 GCDs and 78.7% DPS for all GCDs after (net loss is 15.64, which means that ~23.8% of your GCDs will have to be empty to use it; 50 / (50 + 15.64); 1.033 * (1-.238) = .787).

Where do you get 60 GCDs and 72 GCDs?

1000 / 14.44 = 69.25 GCDs

1000 / 15.64 = 63.94 GCDs

You appear to have extended non-Fractures time to empty by 2.75 GCDs and shorted Fracture by 3.94 GCDs. Correct this and non-Fracture never falls behind.

Again, Fracture never loses out provided it runs for a full duration.