[X] Wait for an opportune moment, and spring an ambush. Take them out hard and fast; as long as you can get Tsukune out safely, you'll address whatever comes next as it happens.
Neo-Chan is right. This is a Jojo battle, and we need to get the first sign of advantage, surprise them and put them in a halt for a few seconds, letting us have enough time to at least incapacitate several key members before they have the chance the retaliate. We may not have time stop yet, but [Star Platinum] can punch at Hypersonic speeds (aka fast as literal lightning, aka faster than fire) with a force on par with Inner Moka, and we saw in the manga that Ghoul Tsukune knocked out Foxy Prick in one shot. Therefore, I can believe that if we surprise the fucker before he can retaliate, we can take him out of the fight before he goes in and causes major damage.
Now, we know that mobility is a key factor as well. Kurumu is fast and Mizore can freeze others. My idea is that we first have Kurumu surprise them by attacking from above and behind fast enough to slash Spider-Bitch's face in the hopes of incapacitating or killing her immediately. While the others are confused, Mizore will freeze their legs and when they are too shocked to react to their legs being completely frozen, we charge in with [Star Platinum] and hit Foxy-Prick as fast and as hard as possible, then smash his fucking face in until he is dead.
Now this plan is incredibly flawed and is doomed to fail, but hey, a least I thought of something concerning a strategy. What do you guys think of it?