If you like the sound you are getting, your chains are fine.
You can also try this signal order:
gibson sg - slash octave fuzz - zakk wylde overdrive - evh crybaby wah - mxr evh phaser - mxr evh flanger - zakk wylde chorus - line 6 amp
You both need to get a delay asap.
Ps: try your brother's chorus with your bass, you may enjoy being like Duff form guns