Sources:
Season 1 Dragon-Releases
Season 2 ITH
Season 3-5 Zanros

encoder: av1an -i input.mkv --photon-noise 6 --chroma-noise -v “--end-usage=q --cpu-used=5 --cq-level=26 --threads=2 --aq-mode=0 --enable-qm=1 --lag-in-frames=48 --arnr-strength=2 --arnr-maxframes=7 --enable-cdef=1 --quant-sharpness=3 --disable-trellis-quant=0 --enable-fwd-kf=1 --deltaq-mode=1 --tune-content=psy --enable-chroma-deltaq=1 --global-motion-method=disflow --tune=ssim --sb-size=dynamic” -o output.mkv
opus audio: jpn 2.0, eng 5.1
subs: Eng
https://slow.pics/c/OY5EA3E2
Straight encode of the sources, no filtering.

[spoiler=mediainfo]Video
ID : 3
Format : AV1
Format/Info : AOMedia Video 1
Format profile : [email protected]
Codec ID : V_AV1
Duration : 24 min 32 s
Bit rate : 1 542 kb/s
Width : 1 920 pixels
Height : 1 080 pixels
Display aspect ratio : 16:9
Frame rate mode : Constant
Frame rate : 23.976 (24000/1001) FPS
Color space : YUV
Chroma subsampling : 4:2:0
Bit depth : 10 bits
Bits/(Pixel*Frame) : 0.031
Stream size : 271 MiB (77%)
Default : No
Forced : No
Color range : Limited

Audio #1
ID : 1
Format : Opus
Codec ID : A_OPUS
Duration : 24 min 31 s
Bit rate : 213 kb/s
Channel(s) : 6 channels
Channel layout : L R C Lb Rb LFE
Sampling rate : 48.0 kHz
Frame rate : 50.000 FPS (960 SPF)
Bit depth : 16 bits
Compression mode : Lossy
Delay relative to video : -7 ms
Stream size : 37.4 MiB (11%)
Writing library : Lavc59.37.100 libopus
Language : English
Default : Yes
Forced : No

Audio #2
ID : 2
Format : Opus
Codec ID : A_OPUS
Duration : 24 min 32 s
Bit rate : 152 kb/s
Channel(s) : 2 channels
Channel layout : L R
Sampling rate : 48.0 kHz
Frame rate : 50.000 FPS (960 SPF)
Bit depth : 16 bits
Compression mode : Lossy
Delay relative to video : -7 ms
Stream size : 26.8 MiB (8%)
Writing library : Lavc59.37.100 libopus
Language : Japanese
Default : No
Forced : No

Text #1
ID : 4
Format : ASS
Codec ID : S_TEXT/ASS
Codec ID/Info : Advanced Sub Station Alpha
Duration : 23 min 18 s
Bit rate : 28.8 kb/s
Frame rate : 14.946 FPS
Count of elements : 20899
Compression mode : Lossless
Stream size : 4.81 MiB (1%)
Title : Songs/Signs
Writing library : Lavc59.37.100 ssa
Language : English
Default : Yes
Forced : No

Text #2
ID : 5
Format : ASS
Codec ID : S_TEXT/ASS
Codec ID/Info : Advanced Sub Station Alpha
Duration : 24 min 23 s
Bit rate : 27.7 kb/s
Frame rate : 14.492 FPS
Count of elements : 21205
Compression mode : Lossless
Stream size : 4.82 MiB (1%)
Title : English
Writing library : Lavc59.37.100 ssa
Language : Japanese
Default : No
Forced : No

Menu
00:00:00.000 : Prologue
00:01:23.000 : Opening
00:02:53.048 : Part A
00:10:09.025 : Part B
00:22:31.058 : Ending
00:24:01.065 : Preview

[/spoiler]