Mmmm.......pie.
Tokico Illumina II are not know for being the most reliable shock. Purchasing a used set is nearly a guarantee that you are getting a dead set.
As far as your question goes about body roll. A cars suspension is a very complex system, with a huge number of variables that affect it.
You should take some time and do some research into the subject.
But the extremely simple and dirty answer is to first look at spring rates, also seen as deflection rate. Increasing the spring rate will help the car in dealing with chassis squat, dive, and roll. Since springs affect all three of these things this is the starting point in dealing with chassis movement.
Next, increasing the spring rate also means that you are increasing the energy stored in the spring when moving over the same distance. So it is a good idea to make adjustments to the shock to control this. At minimum increasing the rebound dampening.
Now understand that the purpose of a shock is to control the rate of compression and rebound, ie controlling the storage and release of energy in the spring.
So you control chassis movement with spring changes, then you control the springs with dampener/shock changes.
Lastly additional control of body roll can be done with the anti-roll/anti-sway bars. Now increasing these front and rear helps with chassis roll but does not effect dive or squat. So it only effect one of the three chassis dynamics you are dealing with. And why its should be adjusted after setting up springs and dampeners.
Now while changes in these can help with body roll they will also affect other things such as instances and initiation of oversteer and understeer. So choosing suspension components should be made with an understanding of what they will do to driving dynamics.
Now Tokico Illumina II's were designed to be stock replacements so they shouldn't change driving dynamics enough to worry about. So if you can get a good set of Tokico Illumina II's then they will return the vehicle to factory behavior, provided that the rest of the suspension is stock and in serviceable condition.