Typically a rich run will not kill your plug.

Figuring out what is causing it to "Bog" over the internet is very hard, Shoot figuring it out while it’s in your hands is tough sometimes. It could be lean, it could be rich, and running it lean will cause the plug to die sooner, Also running the wrong heat range plug/nitro% combo will kill plugs too. When it's bogging, is there a lot of smoke?

If you have a well tuned motor the plug will last a very long time, up to a gallon or even more is very possible.

The question is what does the dead plug’s filament look like coming out of the engine?

If it grayish/white and frosty looking, that’s the sign of excessive heat aka lean mixture
Fix- richen the needles

If it’s shiny but disfigured/smashed or god forbid missing, that’s a sign of pre-ignition (which will also cause a bog at high rpm)
One way to tell this is, If it’s very finicky to tune the high end, In other words if it seams too lean or too rich by moving the needle just a little either way
Fix-run a colder heat range plug or shim the head if you’re running higher nitro,

Good luck