The data is the key to safety and lessons learned.
There is little data to support the idea that a successful relight will exacerbate damage at flight idle.
Having a second engine running at critical flight regimes for electrical and hydraulic power is lot better than one.
The recommendation by the manufacturers are data based on experience and expertise. Pay attention to these before developing your own ad-hoc syllabus.
I do support the publication of manuals, official instructions on this forum as the lead to what-if questions. I'm not a fan of pilots designing their own without regard to normal sources of help.