Magneto wouldn't know how to create k-nite or a red sun pulse, but he doesnt need them to win. People are going beyond discussing who would take a majority in a fight when factoring in all their powers to try and argue magneto's powers couldn't possibly depower, defeat or kill SM when they most certainly can. This isn't a mismatch at all
It does not matter that SM wasn't fighting back against DP, that scan showed that SM can be affected/depowered by electromagnetic manipulation - the scan doesnt make the exact method clear, but whether it was by hampering the sunlight feed or or screweing SM's energy metabolism, it should be obvious that magneto can reproduce that. Mag's career as an energy (including that of living systems) analyzer and manipulator are proof enough that he can figure SM out and use such attacks. I see no PIS in the feat either, it was just of SM's CIS. The storyline in which polaris was amped by the being at north pole contained some elements of PCIS, but he did nothing that was beyond magneto's average in terms of raw power and multitasking.
Furthermore Superman has other showings of being harmed or depowered by EM attacks like the ones delivered by parasite and coldcast, the latter could and would have killed him with the first blast that hit SM during elite.
Other possibilities for mags involve iron manipulation (I still see no reason why this wouldn't possibly work), TK-like manipulation of brain bloodvessels, creative use of metal and simply blasting SM with all he's got.
None of this means that magneto will necessarily win in a straight fight, but they do show that he can hurt and kill SM.
SM's speed would, as usual, be the main difficulty for mags to handle, but I believe he can do it with a combination of shields, AoE attacks, tactical thinking and multitasking. Like I've said before, this could really go either way.
