Regarding the AS Roma v Fiorentina match, at least I only said that maybe AS Roma will fail to win, and that doesn't mean AS Roma will lose. Because ya, anyway, sofar this season atleast AS Roma has had better results for home matches.
I might be different from you, I see that As Roma is experiencing a revival, and in this match of course As Roma will use their abilities to get three points so that their position in the standings remains safe in the top four. I don't mean to think that Fiorentina is trivial, but as you said, this season As Roma is better when playing at home. Indeed, As Roma's revival has not been perfect, because the club owner is still stingy when it comes to spending on players, so As Roma lacks squad depth, when the main players are injured, the players lack even skill. The Italian league, Copa Italia and European leagues make it difficult for Mou to rotate players. but even so, I think Mou's target this season is clear, they want to finish in the top four.
But ya, if for example you might be betting on Fiorentina, then maybe you could choose the double chance option. Or maybe, you can also choose the Asian handicap option by choosing Fiorentina +x.xx, and I think that will still give you good odds, considering that AS Roma is still the favorite team in this match.
For the double betting option, maybe I will choose O/U in this match, because I think this match will end with a big score, because I am sure both teams will score goals.