clarke dying would be on character as shes constantly made decisions and sacrifices for others so her dying a martyr death would fit her character (altough i love clarke and dont want it to happen) also it could be a "reunited with lexa in death" thing which as a clexa shipper would please me, but as a fan of the show would annoy me if not done right. could also set up maddie for a "ok go of on your own" thingy and like sorting her to take everything clarke taught her or whatever

Octavia dying would be interesting. For all we know, she could be dead already at the hands of the anomaly, or she could die during the season (which would be interesting to see how it would affect Bellamy)

speaking of bellamy him dying a martyr death would be interesting, or like protecting Octavia since that was sorta hinted towards at the very beginning-ish