Enabling "Honor Cipher Order" on F5 LTM v12.X

i would never change something in the build in default profiles. create your own default and use that as a parent for the others.

as for working with client ciphers did you look at:

https://support.f5.com/csp/article/K17370

https://devcentral.f5.com/articles/ssl-profiles-part-4-cipher-suites

i would use the mentioned tmm command to determine the names you want to combine those together.

never worked with this but it an attempt to make it easier, although not in 12 sorry

https://support.f5.com/kb/en-us/products/big-ip_ltm/manuals/product/ltm-custom-cipher-ssl-negotiation-configuration-13-0-0/1.html