A Firewater is an insanely orange line of Rainwaters that Dan Lubinsky at Hot Geckos has produced. So you would need a pair of his line of Firewaters to make more true Firewaters, otherwise they would just be Tang. RW Hybinos.
Whitney is correct about the Enigmas, it is it's own genetic morph not a combination of anything.
Thanks Mel for correcting me about the Firewaters. I couldn't remember 100% I got the tangerine right though. Ha. I meant to add when I posted the first time that you'd have to start with one of his line to get true Firewaters. I got so flustered trying to remember what they are that I forgot to add it.
Firewater, is a cross between an HG tang, and a Firewater. So to get a firewater enigma, you would have to breed an enimga to a firewater, and then the offspring back togther. OR the enimga, het firewaters, to more firewaters, and this would get you firewater enigmas.