Superior doesn't really need a subkick.. All you have to do is know how to use a compressor and EQ..
Nah. A sub does a slightly different thing to the sound as opposed to just adding extra low end with an EQ.
Step 1: Put a deep sine wave on a extra track and sidechain gate this with the kickdrum track as key.
Step 2: Go nuts.
around 50-90hz I'm gonna say
At what freq you set the sinewave?
I don't know if you have try it but you can adjust the sine wave to the main tone of the song e.g. if your song is in D you can try put a 73.42Hz sine wave which corresponds ti the D note.