When you terminate someones clone, the respawn timers don't auto-countdown. As long as their clone is alive, the spawns keep counting down to 3 seconds (if they start at a base of 10 seconds). As said above it also ensures 1 clone is lost immediately from the clone count, prevents them from being revives, but it also ensures that any ISK value of that suit is lost.

1. Officer Suits/Weapon wielding suits - Terminating clones ensures that equipment is lost, and cannot be recovered via logi needle. Officer Equipped suits are always terminated regardless of likelihood of needles nearby.

2. Sentinels (and heavies in general) - Fewer things in this game are as frightening to a support troop as an amarr sentinel standing back up at 100% HP.

3. PRO Logistics Suits - Ensure the greatest ISK damage done to the enemy team. Almost always carry high tier uplinks as well

4. Assaults/Scouts - Very dangerous if picked back up

5. All other suits

Also, I will terminate clones as a follow up to breaching into a meat-grinder (with a flux grenade) to ensure there is no chance of any of the above getting resurrected by logis that spawn in or haven't been eliminated yet.

I have found that more often than not when I'm running a punching commando, suits are terminated by my fist anyway, so there is rarely any need to stop.

When Sniping, Terminating Sentinels and Caldari Assault Suits takes priority over killing living assault suits (but is below killing logis and other snipers), to give my advancing teammates optimal chances and maximize my rifle's effectiveness.