I didn't know you had to go 6-0 to win a battle. Look at the overview of your opponents team and you will most likely find a poke on your team that isn't needed. Sacrifice it for the switch in.
That is not supporting your argument about Flying-types being a good switch-in to Special Emboar and Ludicolo; in fact, I do not even know what you are talking about. Also, making a battle 6-5 is not exactly a game heading your way.
To make this post not completely useless, Throh is a really good Pokemon against Hail teams, especially with hazards. It has the bulk to take some attacks and can start phazing away repeatedly with Circle Throw. Although Duosion does not take entry hazards damage, it gets forced out everytime it tries to switch in to Throh. Also, a general Dark + Fighting type core can usually smash most Hail teams since Duosion is usually their only counter to Fighting-types which allows said Dark-type to trap it with Pursuit.