Over complicating things

Sterile seed mix, containers, tools...nope, nope, nope. I think one of the reasons damping off is so common is because of 'sterile' seed mix, because you need beneficial microbes to outcompete the pathogenic ones. I always use worm castings in my seed mix and very rarely get damping off. 

Air movement is good for plants, yes. I have a small computer fan in my grow tent for my chilli seedlings, it helps prevent botrytis in what can be a very humid environment. Outside of an enclosed space like a grow tent, a fan is likely unnecessary. 

I only bottom water if the compost has gone very dry and needs a good re-soaking. I don't have enough no-hole trays to bottom water everything.