You can put these two above your other repos:
[zfs-linux-lts]
Server = http://kernels.archzfs.com/$repo/
[zfs-linux]
Server = http://kernels.archzfs.com/$repo/
and these below all the offical repos.
[archzfs]
# Origin Server - France
Server = http://archzfs.com/$repo/x86_64
# Mirror - Germany
Server = https://mirror.biocrafting.net/archlinux/archzfs/$repo/x86_64
# Mirror - India
#Server = https://mirror.in.themindsmaze.com/archzfs/$repo/x86_64
# Mirror - US
Server = https://zxcvfdsa.com/archzfs/$repo/$arch
I have been using this setup for years and never had any breakage.