i personally cant stand sidechaining, as said, everyman and his mother uses that technique and its become pretty cliched now in terms of use and general thought amongst techno producers, but more particulary newer producers. I just dont like that feeling it gives at all unfortunately, i dont want my basses to duck when the kick comes in, i want them both to be playing off each other instead and creating extra dynamics that comes with this, and for me personally i apply good solid EQ, Subtractive EQ and applied compression, but ive never wanted that oomph oomph sound anyway, and i just dont personally think its a great technique overall, just my 2 bobs worth