Mulligans
Midrange Mulligans
Since there's no backstab, pilfer into fence is the dream against aggro, apart from that you're just looking for the regular low cost mulligan, against control you may want to hold on to card draw.
Don’t let your tak prep espionage dream be a meme. Most people playing Tesspionage will be playing the pirate tempo version but I think it runs out of steam in a against some decks if you’re not able to finish off the opponent. Rogue has some new control tools to be more competitive in the late game.