for some of those stabs ive just used simple kick drums.
adjust the attack, put some phase distortion and guitar distortion on it.
do the same with another kick and lowpass it and then layer them.
theres so many techniques though.
I dont think that is how he makes them but its quite fun when you make a really fucked up sound.
assuming you want thumping sub bass then, stuff like compression and that should be for the synthy sounds over this... use a sin wave to get 'pure' sound that hits in a club or a sub and a square/saw to add some harmonics so it's more audiable on a normal system!