Yeah, have a look at this, but if you think your timing / phrasing is good, maybe record what you are doing now and then go back to the crossfader and record that, listen back to them both and compare etc.
Also, and this might not be universally agreed upon, but I would never fade basslines or have both bass elements playing at the same time. I might fade one kick drum into another if there are no other bass elements at play, but I would never fade basslines / bass elements with either the faders or EQ. It almost never sounds clean, even if they are different sounding voices and in different octaves etc having them playing at the same time gets muddy. You can sometimes get away with it in a club on a ‘boomy’ system, but recorded and listened back it always sounds a bit amateurish / shite to me. I like a nice clean change from one bassline / bass to the other. That said, lots of top DJs to mix their basses / basslines / bass elements together at times.
