For Reno, keep in mind that your deck doesn't need to have only one of every card for its effect to proc. It needs only one of any card remaining
when you play Reno. Source: the wiki says, "However, it is possible to add some duplicates, as long as the player is able to draw or discard them from the deck before playing Reno Jackson."
http://hearthstone.gamepedia.com/Reno_Jackson
So you can play two backstabs and two si, because you're going to be playing them early anyway.
Someone did an analysis of the probability of being able to proc Reno based on how many duplicates you have:
https://www.reddit.com/r/hearthstone...use_with_reno/