Having said that, I agree that Firenze's team does not belong in the very low side of Serie A, but this year they are struggling very much. They have no strategy, players do not look close at all and their performance has been very poor throughout the season.
Fiorentina on the other hand is same one win, one tie, 3 losses like cagliari but 7 points ahead of them as well. So do not be worried, if you feel like they are going to relegate never look at how they are doing, look at what others are doing as well, there is 3 teams relegating, but there is also 3 more teams in between fiorentina and relegation zone as well. That is why I think they are not dropping this year.