For pics, 2 bedroom selfies in good lighting, unfrauded.
Bio was my occupation, my height (you're 6' right? Say you're 6'1", none of them will be able to tell), and a joke about Tinder. It was a Schopenhauer quote when I first made it.
I never saw much below 4s and I didn't right swipe them if I did (though conceivably I was willing to go down to 3s, I didn't stick to it in practice
). Left swipes for trannies, obeasts, holes that looked too far out of my league (why bother - remember ELO - you want them to like you back), holes that looked like bots, holes that made a point to list a meme sexuality in their bios, holes in open relationships (I've mentioned this before - most of them were Noodlewhores), single mothers (I made one exception, I think), holes with excessive tattoos and hair coloring.
Message first, sometimes.
Gold, no.
Re: ELO, I don't think it's useful to match with fags. The algorithm probably measures your success relative to other "men looking for men", where everyone's match frequency is near enough to 1.