Manual/ Continuous ignition is a useful thing, and using it for evry approach and takeoff regarless as well as mild turbulence is a total waste.
I have seen it years ago in Nigeria, the (South African) company's SOP's had it at transition altitude with the approach checklist...and it was ON, not AS REQD.
I had complained about it with many other pilots, but fell into deaf ears...until they were unable to start EITHER engine in a remote stand in Lagos... A/C AOC because of spark plugs! We had a great laugh!
