It depends.

Tá cat anois agam (or Tá cat agam anois)
but
Tá fadhb agam le drugaí (rather than Tá fadhb le drugaí agam)
but
Tá fadhb le réiteach agam. (rather than Tá fadhb agam le réiteach)

I'm aware. I just thought that, since the post was about the placement of prepositions, it would be better to ask here than in a new thread. But I think I get it: apart from the special case as originally asked about (le with the verbal noun), the prepositional pronouns come first when they are used as a phrasal verb. But if it's some other data, it comes after. So, would Casadh é ar maidin orm be nicer than Casadah é orm ar maidin? Or would Casadh orm ar maidin é be even better, because of the tendency to move prepositional objects to the end of the clause?

Mods, please feel free to split this thread if you think my question would be better somewhere else.

go raibh míle maith agaibh gach duine