My military life consisted of shooting approaches to the hover over the sea for various reasons.
After a while it becomes second nature but because of our mil mentality monitoring eachothers actions in the descent was almost a religious act. Repeating instructions chanting lists, and sometimes praying for the engines to stay lit!
BUT it has been known occasionally for the driver to miss a cue and the co pilot not to follow up because they thought the HP was all over it with the end result that the anti coll on the underside got wet!
Maybe both pilots were overly relaxed about the others capabilities?
On the perennial twin engine issue.
I lost three engines in my 30 years of flying twins. None flying singles.
The first caused the computers to overtorque in the hover but even then we glanced off the sea transitioning away.
The 2nd in a twin squirrel lost some compressor blades over a city and forced me to land clear of the built up area.
The third was compressor stall every time i applied power forcing me to commit to land whilst over a football stadium.
All of the above would have ended very differently if i only flew singles!