Aha, I can finally post!

The DoT clipping numbers have been included, the Phlebotomize clips but the Chaos Thrust doesn't.
PH does not clip in any of the setups at 2.4s GCDs. In the simple rotation the PH is cast at t=2.4 and 21.6. The difference is 19.2 seconds. PH is an 18 second DOT. You'd have to drop the GCD below 2.25 or something to clip PH. In the IDC-anchored rotation with no FR, PH is cast at t=16.8, 36, and 55.2. Again, 19.2s spreads.

You probably want to review how you're assessing DOT/buff timing.

With Rotation B and C, since by default most of the DoTs clip, as spell speed increases the lost potency will get worse and worse.
The simple rotation has the best "not clipping when scaled with more skill speed" characteristic since it has the lowest DE and CT uptime.

then in fights with less than 100% uptime, the rotation with more DoTs will always pull ahead.
I'm gonna go ahead and address / call this out now: this is a fallacy and you need to stop leaning on it to justify vague assumptions and your personal preference. DOTs are not inherently better with lost contact time. The key is how much potential damage is unloaded per GCD of contact time.

In games where the DOTs do "5000" damage compared to a direct damage GCD of "500", then yes "keeping up the DOT during loss of contact" matters. However, this has nothing to do with the player being out of range of the boss with DOTs ticking, directly. It has to do with the fact that it was your last chance to unload a GCD, so you want to unload a "BIG" GCD -- the 5k DOT, not a 500 damage strike.

In FF14, the DOTs are not hyper-efficient per GCD. Hell, untraited Fracture is barely efficient at all.

In this game, hitting a buffed Fracture is 253 potency. Hitting the Vorpal Thrust is 242. If you're about to lose contact with a boss, neither attack has a significant advantage. There is no "DOT advantage". There is only "the biggest GCD I can use before the boss is too far away".

The only DOTs that you should concern yourself with in terms of "must refresh before losing contact" are CT and PH, and only if they are running out soon (and in CT's case, if you can even finish the chain before you lose contact -- in all likelihood the only real decision would be to refresh PH or use something else like ID-DE, or a loose ID).