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).