The Wheeler kit might be overkill. But the included Wheeler torque screw driver is a valuable tool, not only for scope mounting but action screws too. Stripping a ring bolt is bad, but breaking off a base mounting screw in the action will ruin your day, so using correct torque values is a very good idea. I use a tiny dab of BLUE Loctite on base and ring bolts; not everyone does.
I bought just the Wheeler torque screw driver and use a DIY ring lapping tool, but suit yourself.
I think the bore sighter is definitively over kill. I can't imagine paying that much for a tool which isn't really necessary. I suppose if you were putting together a rifle where you MUST hit the target on the first shot and you have no opportunity to zero the rifle at a range, then it might be useful. But that would make you an assassin or a 007 spy, wouldn't it?
I bore-sight rifles after swapping scopes all the time. Just bring your gun vise or use a good front rest and rear bag to hold the rifle steady. Remove the bolt, set the gun up on a steady bench, and wiggle things around until you see the target centered in the bore. I shoot at a public range and it's easy to find one of those targets with an 8" or 10" diameter black dot with a red bulls eye. They are easy to see when looking down the bore. Use either 50 or 100 yards, whichever is convenient. Then, without moving the rifle, look through the scope and move the cross hairs to the center of the target. Double and triple check your alignment, and fire the first shot (at your target of course). You should easily be on a 8" diameter target. Adjust your scope as appropriate, fire again, fine tune the aim point, fire a third time and you'll be zeroed in or very very close to zero. It's just that easy....... and cheap too.