This is not a good idea.
Tibloc Tech Info
1. Proper usage of a tibloc requires a biner with a barstock diameter of 10 to 12 mm. The biner pushes the rope into the teeth, so it has to be of the right size and shape to do so.
2. Proper usage of a tibloc requires that the teeth be set into the rope sheath before weighting. Typically this is done with the thumb. Not doing this risks ripping the sheath (and my experience supports this).
3. Falling on a toothed ascender is never a good idea. Fall far enough and the device will chop the rope. People use mini traxions for solo toproping, but the system is rigged so that there is little slack.
You can do what you want, but I wouldn't recommend this system to others.