Regarding Noz vs Rafaam though, I will take Rafaam if i'm offered both.
I think I'm more likely to take 1st with Rafaam, but I'm more likely to top 4 with Rafaam. Noz is fantastic for consistency because seeing more rolls is going to help you, but you are still limited to buying the same power level things as everyone else. Rafaam is providing you 1 gold minions starting on turn 2 and those minions are going to help you finish triples, especially triples of either spawn or common taunts. So you end up getting 7 on board the fastest and just generally being in a position where it would be very difficult to bottom 4.
I think I take KT over Noz these days as well for a similar reason. KT's 5, 7 and 8 gold turns are just super nutty unless you super low roll your windows.