Sweet spot settings for re-encoding 1080p/4k videos to 1080p?

[dillhole13]

Since a lot of videos released are 4k with AVC encoding and end up 4+ GB I like to re-encode a lot of my stuff down to 1080p HEVC. So far the settings I use to either shrink the filesize of large 1080p videos or scale 4k down to 1080p in Handbrake are:

Starting from the Fast 1080p30 setting I'll set

Video Encoder: H.265 10-bit (x265)
Framerate: Same as Source, Constant Framerate
Quality: Constant Quality 24
Encoder Preset: Slow
Encoder Profile: Main 10
Encoder Level: 5.1
Advanced Options:

strong-intra-smoothing=0:rect=0:aq-mode=1:rd=4:psy-rd=0.75:psy-rdoq=4.0:rdoq-level=1:rskip=2

Honestly I don't know much about what those last three settings mean, as I just copied them from a youtube video, but they seem to make really nice quality 1080p videos with great filesizes. And if I'm re-encoding 720p I'll up the quality to Constant Quality 22.

For anyone who posts a lot of videos, is there a better Handbrake sweet spot in settings for 1080p and 720p re-encodings, assuming I'm downloading the high quality 1080p/4k videos that are posted here?

Is there much bang for your buck in quality+filesize versus time going down to Very Slow for Encoder Settings and/or doing Two-Pass? Slow vs Fast definitely seems worth the extra encode time for example.

[dillhole13]

D'oh is there a way to post something as code so it doesn't get smileys added in? Makes my post above on advanced options worthless lol.

EDIT: nm, missed the "Go Advanced" button and saw the code tags in it.