Exactly what I’ve done. Two stem faceplate bolts, one stem clamp, headset top bolt, both brake lever clamps, saddle clamp and seatpost bolt all fitted with Hexlox. Not cheap but neither is losing your entire front end.
Likewise. Torx at the very least. I'm trying to get us to stock hexlox as well. I reckon the lower end thieves rather than those with bike storage are going after the controls. Easier to store and move on.
Probably not that we'll equipped but I'd be more inclined to go down the Hexlox route just for peace of mind
https://hexlox.com