TL;DR bolded.

With other jobs, time isn't a factor with maintaining stacks or your gauge. Most build up and have no timer whatsoever. Of course MNKs have always had Greased Lightning, but their Chakra stacks do not decrease after time. More towards my point, BLMs need to maintain Astral/Umbral to fill their Enochian gauge (which can be done forever without a target thanks to Transpose having a lower CD than their status). If a BLM fills their Enochian gauge and builds a stack of Polyglot (used for Foul spell), that Polyglot status will remain even if the BLM loses their Enochian. This is what I want for DRG.

If Blood of the Dragon is lost, keep all stacks that have been gained and when you turn BotD back on those stacks are still there waiting. You should not be able to gain more stacks or execute Nastrond without being in BotD (even with 3 stacks, need that BotD on). This change wouldn't break anything and would put DRGs on par with how other gauges and resources work.