The battle with the Parasite twins reaches its conclusion in the Rucka, Clark and Lanning story in Adventures of Superman 635 (Feb. 05).
Superman heads to see John Henry Irons, and borrows a modified Steel outfit, one that encases him completely. This prevents the Parasites from drawing any more energy off of him.
The issue is pretty much one long battle scene, which lasts until the power the twins have stolen from Superman wears off. Superman turns the twins over to Lupe Leocardo and the SCU, and heads off to find Ruin.
The story continues in the next issue.