I like to do as much within the instrument as possible (EQ, compression, setting levels) so that when I freeze the drums there'll be less subsequent overhead in the project. Get a good balance in SD2's mixer first, with the DAW channels zeroed. After freezing, you can use the track gain controls to further fine-tune levels. Freezing Superior saves gobs of memory, and even when it's not the most memory-hungry instrument in a given project, it still takes the longest to load.