Saiki Kusuo no Sainan - Shijou Saidai no Sainan (3DS) .CMDL end .CTEX

[Keikei14]

Hello! I'm also trying to rip files from Saiki Kusuo no Sainan - Shijou Saidai no Sainan and eventually figured out how to deal with the files! 

Prerequisites:
QuickBMS -> https://aluigi.altervista.org/quickbms.htm
add_pac.bms -> https://aluigi.altervista.org/bms/add_pac.bms
lzs.bms -> https://aluigi.altervista.org/bms/lzs.bms
Ohana3ds -> https://gbatemp.net/threads/wip-ohana3ds-tool.392576/

To extract the .PACs, use QuickBMS with the add_pac.bms as the script.
After extracting, you can decompress the individual files with the lzs.bms script.

Example (I am extracting Kuboyasu's model):
quickbms.exe add_pac.bms quest08.pac quest08 -> This will extract all files in quest08.pac into quest08 folder.
quickbms.exe lzs.bms "quest08/ch09_kuboyasu_face.ctex" -> This will decompress the ch09_kuboyasu_face.ctex file into the same folder as the exe.
quickbms.exe lzs.bms "quest08/ch09a_kuboyasu.cmdl" -> Self explanatory, same as previous.
quickbms.exe lzs.bms "quest08/ch09a_kuboyasu_ware.ctex"  -> Self explanatory, same as previous.

After which, you can open the .cmdl and the .ctex files into Ohana3ds.

Hopefully this has been helpful! I've been racking my brains out trying to figure this out too.