- Since it just says to nominate a unit, I'd think it could be any unit.
- I don't see where that is denied.
- I'd say no.
- I'd say yes. You are nominating the unit yourself. The rules for those saves just say in close combat, which you are in. I'd say that if you don't want those saves taken, pick a different unit.
- It says it has to be placed -- I don't think you can place a unit someplace that would trigger a mishap, except within an inch of an enemy unit. I'd say no to this one.