It's going to be somewhat dependent of the wear on your suspension. As the tire rolls there is pressure from the street trying to push them apart - to toed out.
Setting it slightly toed-in to start with compensates for that pressure - eventually equalizing to a straight ahead position - when they just roll without scuffing. (Scuffing is actually removing rubber!)
The more everything is worn, the more it toes out when driving.
If the suspension is new, set it to slightly less toe-in.
The real proof is in the results.
Keep an eye on the tires and how they wear. After 500 miles or so - Lay your hand flat across the tread. You can "feel" how it's doing. You can feel if one side of the tread is wearing more than the other. That's camber - not easy to correct on a Jeep.
After you feel the crown, drag your hand back and forth across the tread. Notice the grooves - the edges in particular. If the inside edges of the grooves feel like sharp corners and the outside edges feel more rounded, then it has too much toe-in. The tire is sliding sideways slightly on the road (scuffing,) causing inside of the groove's edge to feather a little, the other side will feel slightly rounded.
If it is actually making a feather edge it's waaay off! Both sides of the groove should be about equal.
Notice how an experienced alignment guy looks at it - he "looks" then "feels" before he tells you what's needed. It's all right there if you know how to "read" it.