Great advice. Thank youComms and power equipment and gets replaced quickly, I wouldn't bother with that (at least not without a certain weapon). Anti-air radar seems to stay dead forever, so I make it a point to blow all of them up.
Be aware that shooting at equipment counts against your accuracy in missions. It's not a huge amount, but could mean the difference between S and A.

S ranks are few and far between so not too worried about that at the moment, but good to know that equipment hits counts as misses.