Handling or ride. You can’t have both in this type of front wheel drive. Of course you can get a compromise. To give you a little understanding of how to make a Dai handle see my post here
Tires of course play a major part.
One compromise to the correct rear spring rate is an anti roll bar. They sort of work and will give a better ride than a stiffly sprung rear. They are though just a torsion bar that couples one side of the car to the other. So under load in a corner it applies force to both sides, whereas spring effect is on a corner by corner basis (sort of).
Have a read through my build thread about suspension or better yet search for “Koni” in "All most Track).