So what are the best quality Render settings in 4.8 for both 3Delight & IRay?

Haven't rendered anything since my last DS(4.0) installed hdd crashed year before last, but I kept notes of what the best 3Delight settings were with that version. Do they still work best in 4.8, do I use the Default 4.8 Render settings, or is it something else? Bucket Order this, Pixel shading that,... etc.

Also, what are the best overall settings for IRay for just 2-3 lights and V4 skin and hair? Render settings that is.

Well, you're welcome to give recommendations for best lights to use too(for IRay), but that's another subject. Probably best saved for another time. For now, just the Render settings.