Such a good show, thanks for reminding me. I lost interest during one of their "mid season finales," the last thing I remember is Ivar fighting off his brothers' forces with a castle that was just full, I mean fucking teeming with some really deadly traps.
Vikings really shined when Ragnar was still alive.The story of the sons has been well-done, but it's just not as gripping as when the sole main characters were Ragnar, Lagertha and Rollo.
Actually that's as far as I got too, I also started losing interest after the Ragnar arc and then I got distracted by Vinland Saga, which is also a bitchin Vikings story if you don't mind anime.
I didn't even know about The Last Kingdom, thanks for recommending I'll put it on my queue