Literature- definitely connect ed (they only do units 3 + 4 lit though I think so the focus is obviously for exams- that is, passage analysis)! For text-specific perspective (only year 12 texts though), VATE is the best!!! The good thing about these is they're both VERY affordable SO for any y12 students, I recommend attending both!
Chem- Neap (weekly classes); TSFX (holiday workshops)
Methods (and spesh)- TSFX (weekly and holiday classes)
From personal experience, I think there is no need to do both holiday/weekly but each to their own I guess! These are for units 3 + 4 though but I'm assuming it should be the same regardless of unit- also if you want some advice, I don't think classes (weekly or holiday) is useful for unit 2 (you might as well save money for next year); but if you're really keen then you should just do the holiday classes but definitely not weekly classes for unit 2!
Hope this helps!