How to deal with deep strike ?

Hi everyone,

I played a few game with my friend, he plays Custodes and Tau.
Those 2 armies have kind of a lot of deep strike units. I try to keep a backline (often jackhal) to prevent rapid ingress but it’s kinda hard to keep my units only for that purpose.
When he find a spot to spawn, the shooting phase wipe my jackhals.

How do you manage to keep you backline safe during your games ?

Thanks !