So what is your question exactly?
Are you wondering how to make brutal metal chipmusic?
My advice would be to get creative and forget about trying to fit into a specific genre.
The Zen of Screaming by Melissa Cross helped me with my vocals(or should I say helped me scream better without hurting myself) but I learned much more by just going to shows and spending time with other vocalists/metalheads/artists in Northern California.
I've also found that if you use an MXR Fullbore Metal pedal with something like a tube screamer or BOSS DS-1 or some other type of overdrive/distortion pedal in front of it along with a guitar with a bridge humbucker you can turn pretty much any amp with a clean channel into a brutal metal fire breathing monster.
The Carvin DC7X or DC800 is the guitar your going to want for everything from blues/jazz to the most brutal metal.
And I feel like the ultimate guitar pick for brutal metal is the Dunlop Ultex Sharp .73mm.
For chipmusic brutal metal I would recommend recording some samples from your LSDJ instruments into a computer and trigger them with a midi keyboard or drum pad to help you with odd time signatures and accents.
You can make some brutal sounding stuff if you use the WAV channel in LSDJ then mess around in the Instrument and Table screens while your phrases/chains are playing.