Take send 1 or send 2 to your effects and return signal to any of the inputs. Then you can assign the input to a track and record if you want to print a track or assign it to the sub/aux bus to monitor the track with out printing. Assign what tracks but using the send on each channel.
This is exactly what I do - sends 1 and 2 out to the rack, bring the effected signals back in on inputs C and D, assign to a stereo pair of tracks...this allows you to balance your dry and effected tracks nicely at mixdown to get exactly the sound you're after.
Forgive my ignorance, but why do people want both the wet and dry track to "balance"? Like, if the effected track has a bit too much of an effect, then you just put the dry track higher in the mix? Do most people always do two tracks (the wet/dry) for every part where they want an external effect?