Yeah, was misremembering a Berserk adjusted time that I did a while back rather than doing the math like I should have. If you Berserk adjust (only consuming for 16 out of 18 GCDs) the Non-Fracture rotation, you get a 7.28 net TP loss/GCD and 8.34 for the Fracture Rotation, which gives you 130.5 and 113.9 GCD until you run out. With those, Non-Frac won't ever actually overcome Fracture like you said, though the difference is nowhere *near* impressive or even remotely impressive (.27% increase in total damage). At 192 GCDs (8 minutes), the difference between GCD and non-GCD is .62% ((114 * 103.3 + (192 - 114) * 78.7) / (130 * 100 + (192 - 130) * 77.5)).
Of course, for all of this, we're ignoring the fact that it clashes with buff durations causing either itself or one of your other high damage attacks to not benefit from SE. I've been *inflating* the contributions of Fracture by a small margin for the entire course of this discussion. At the marginal improvements that we're getting to, that inflation is going to actually have an impact. The difference might not be as stark as I originally conceived it to be, but the fact remains that Fracture doesn't even get close to making a noticeable impact upon anything except for your TP costs (unless you're so good that you can notice differences of fractions of a percent). Rounding error on a parser, RNG variation, and lag variability are going to have a greater impact than Fracture on total DPS.
950 isn't arbitrary. As I explained before, it's the point wherein you absolutely have to start hitting empty GCDs because none of your abilities have enough TP. The actual number is slightly higher than that thanks to the average cost being in the 60s, but 950 is the point where your total net consumption prevents you from using *any* of your attacks and forces you to wait to get more TP. It's not arbitrary. You're almost never going to actually bottom out your TP when you've got empty GCDs; you're going to get empty GCDs when you've just got too little which is where the 950 comes from for the reasons previously mentioned.Additionally, this just makes no sense. 950 is a purely arbitrary number.