Again its not a clear picture dumping all Senecas together. There was the 1,2,3,4 and 5 all very different animals.
Only when you get to the 5 are you looking at a different beast. One with turbocharged, intercooled waste gated engines which unlike the earlier models can produce unlimited maximum power.
I have over 2000 hours in the fives. In the cruise engine out they are a doddle and frankly if a pilot crashes he should not be flying twins.
in the climb out there is a danger zone but then a thinking pilot will close both and treat it like a single to an off airfield landing.
Once you are at say 500 feet why climb at blue line? The thinking pilot will think that the seneca five is a doddle in level flight and just go for level flight and a low level circuit!
But no they try to climb at blue line, get below with a bit of sink and then loose the plot
Single piston or turbine you are going down! day night, summer winter. over sea, fog banks, low cloud or whatever.
Remember this phrase " A twin gives you more options! with more options comes more choices. With more choices comes the option to make the wrong choice"
With a single your only option is to go down
Pace