Truthfully, I would prefer that I get replacements who weren't in the game prior to their sub-in. Failing that, because it's unlikely, I would prefer that town roles replace the players in need of replacement, for obvious reasons. Having a mafia or SK role as the previous role before a replacement could, understandably, affect the player's actions in the new role.

That said, I will consider both you, AVSM, and Greyblades as well, as last resorts should I not find anyone else to replace roles.