1. An unpowered rotor will NOT Chew its way down, The ROD will be as low as you can get it before entry in the tree tops. If you have time for in the wind I'm all for it , But adding forward cyclic will droop rpm- with a minimum of time you need to arrest the fall before the rotors are lost,After the blades are gone all control is lost and you become the battering ram at the front if any forward speed is left.
2. aft cyclic and bumping collective will rotate the aircraft attitude and raise the tail rotor clear. No aft cyclic? Some helicopters tuck on a power failure, It all depends on the way some helicopters handle.
3. Ty a right 180 auto then a left 180 auto-Tell the results.
The #1 rule is get home alive.
You have some good answers.