SBK sinx help

So i came to this server with the intention of playing an sb sinx which i know very well, but have also been playing for a looooong time.

Then i saw the epicness that is soul breaker based sinx on this server, they pumped out incredible in PvP with like no cast time and what seemed like no after-cast delay.

I had to try it out, so i looked around on google and all i found was either very old information or poorly written and plain out wrong guides.

So I was wondering if someone could shed some light on how to achieve such great amounts of epicness with a sbk sinx.