[Clonezilla-live] Linux system backup: partitions, Secure Boot, LUKS, UEFI...

[<l0...@tu...>]

Hi everyone,

I'm sure this is a basic question but I can't find a clear answer on the internet...
Here is my situation:

I have a Debian 10 (UEFI with Secure Boot) on multiple LVM2 partitions inside LUKS as follows:
NAME                       FSTYPE      LABEL         MOUNTPOINT   SIZEnvme0n1                                                           477G├─nvme0n1p1                vfat        SYSTEM        /boot/efi    477M├─nvme0n1p2                                                        16M├─nvme0n1p3                ext4        boot          /boot        477M├─nvme0n1p4                ntfs        WinRE_DRV                 1000M└─nvme0n1p5                crypto_LUKS                          474,8G  └─nvme0n1p5_crypt        LVM2_member                          474,8G    ├─myLvmGroup-myLvmSwap swap                      [SWAP]      14,9G    ├─myLvmGroup-myLvmVar  ext4        var           /var        18,6G    ├─myLvmGroup-myLvmRoot ext4        root          /           74,5G    └─myLvmGroup-myLvmHome ext4        home          /home        326G

I'm already doing a backup of /home via borgbackup.
I would like now to make a SYSTEM backup.
Which partitions should I choose please? I'm thinking of / and /var at least but do I need /boot and /boot/efi? 
Will I be able to restore my backups considering the fact some are encrypted (LUKS) while some are not (/boot)?

Thank you in advance :)
Best regards,
l0f4r0