Yeah i feel like the heatsink would be working against you and probably wear out your coil alot quicker since itd have to run at a higher temp more constantly since that heat was being bled off so quickly.
Until disposable/stronger coils come around to where we can press a button, heat the nail, take the dab, let go, and the nail instantly cools, it doesnt seem like theres gonna be any real problem solver. Maybe another layer of quartz around the D-nail type nail would work but only so much for so long. Itll eventually all heat up to a hot enough temp to melt/burn stuff. shouldnt be able to really ignite anything from a drop or a spill for like 30 seconds. Some charred carpet, maybe some toasted wood. haha.
One company makes one like i described but theyre really expensive and not sure on the longevity of them.