Now double the exposure time to the tail rotor in a reverse climb and what does that do to the orders of magnitude
As you appear to have a lack of knowledge about what 'order of magnitude' actually means, it's probably a pointless discussion to continue, although you don't give any evidence as to why the time is doubled? A back up procedure to a TDP of 200 ft isn't going to take double the time to reach 200 ft in a vertical climb - why would it?