Fusible link or not?

I am going to install a relay to power a fused distribution block to power things like the line-lock, the efi, distributor, ignition box. Since I can put appropriate fuses for each item, would be beneficial or detrimental to put a fusible link in the line to power the relay.

If so, would you place it before the relay or after the relay but before the distribution block?

Lastly, what size link is appropriate for that use?

Thanks for the help, this is like the one I have.