This is just your standard 510 to ego adapter. While it will protect threads because it is being used instead of the threads on your device, it will not work when the 510 threads are shot as in your case.
The air flow controller is a good idea, but, again, it will not work if the threads are gone. Be aware that you will not have a catch cup since the top is flat. Depending on your vaporizer, it could get messy. They all have some seepage or condensate which go through the center hole of the 510. Some vaporizers do not have a center hole (some of RBA's). I have seen catch cups for sale, but cannot remember where.
Conductive epoxy might work to fix whatever adapter you choose. It can get pretty hot down there, so the epoxy might break down quickly under the heat load.
Sometimes a quick fix is can be taking a strand from an 18 gage lamp wire and wrapping it around the thread of your adapter.
the 510 is a weird thread size so you might have trouble finding a tap-not that it would help you at all.
It might be possible to go ego to 901 to 510, but it would start to look a little strange.
This may just end up being a FUBAR, or you could start vaping ego style vaporizers like Evod's or T3's.
BTW, I do have some of these ego adapters and they all have 510 female threads so you would not be without a 510 connection.