Use:
A 24"75 scale Dean ML and a 25"5 scale Ibanez RG370DX.
Fantastic strings for slightly downtuned metal, good resonance, fantastic aging time (slightly worse than Elixirs), possibly a bit bright at first, but they mellow very well for progressive metal.
Conclusion:
The only brand of strings I use anymore.
Note: They may rust faster than they did for me if your environment isn't as safe, or your hands have a corrosive component.