Sasless - the answer to your first question depends on the terrain you are flying over.
Safe landing would be one that isn’t a crash so ideally pax and airframe undamaged.
In reality, if you can walk away from it without killing or injuring anyone then damage to the aircraft and landing area can be sorted by the insurance companies.
Most of my flying over congested areas has been London, which, as you know has specific routes and heights - often below 1000’ all - but follow areas where a safe landing could be achieved.
When doing so in a single, I have always been very conscious of where I would go in the event of a power loss - and that with a high inertia rotor system on an aircraft I regularly flew PFLs and EOLs in.
Low level - let’s say below 500’ - all in a low inertia rotor helicopter over a congested area with no prescribed safe routes and few clear areas is not my idea of sensible.
Happy New Year by the way
