The twrp version is the latest, which means the 18.104.22.168. It cames to me in automatic with the kindle fire utility tool.
For what regards the firefirefire's version, sorry man but i'm not able to help you. I think it's the latest also in this case because i've selected "install the latest version of firefirefire" in the kindle fire utility tool, but i don't know where i can check it.
For what concerns the logcat on booting i don't know how to do it because if i flash one of these ROM adb does not recognize the device.