This site may earn a commission from merchant links like Ebay, Amazon, and others.
It's the string attack that tends to ruin things.
Multiband compression is my favourite here.
I will solo each band of the compressor and work on it, usually ending up with something like this:
Fairly heavy sub compression
Subtle bass compression
Average mid compression
Extreme attack range treble compression
Subtle high end compression
To make a very controlled, consistent bass track.
Apart from that I like to scoop the bass to let the mids of the guitar sit there, and create an attack peak in the bass to fit into wherever the nasty fizz is cut from the guitars.