Codeine can't be smoked.
If you don't ingest it orally, it won't do anything. I don't know what strength tylonol 3 is - but you should not put ground-up pills on your weed, because the smoke from pill binders being burnt are most likely highly toxic.
And if you have weed and codeine, why take nutmeg? It's not known for being a pleasant or manageable drug. Takes hours to kick in, lasts for too long.
So....
Cons:
"smoking" tylenol won't get you high, and is likely to be highly toxic.
2 tylenol tablets is probably not enough to be psychoactive - not that codeine is smokeable
eating nutmeg is not generally a fun experience
Nutmeg is toxic in itself, and can cause you to feel ill for days
Pros:
None. Just smoke some weed. Don't smoke weed with crushed tablets in it. If you must, try making edibles out of this "laced" weed.
Don't smoke it.