>>717737432
I don't know anon, as far as googling gets me, Kobayashi was only involved with Makai Senki (season 2) and Honoo no Kokuin (the first anime). Makai Senki was awful but Honoo no Kokuin was fantastic so I'm surprised they have the same writer behind them.
Anyway you just go in production order. Beast of the Holy Night was really good, Red Requiem was completely forgettable, Makai Senki sucked, and then Soukoku no Maryu was visually impressive if nothing else. After that they leave Kouga as t he protag behind and focus on a new cast with Yami o Terasu Mono but that's where I lost interest and stopped watching.
Incidentally Honoo no Kokuin is great and my favourite thing to come from the franchise, but the movie isn't worth watching, it adds nothing and just milks it with an extension*. The second and third anime productions weren't good either.
*Totally different show but Infini-T Force was the same actually, really good TV series that had a movie that was a complete waste of time.