i use it allot especially when the enemy has 3 mrk 2 parasite star ships, it works wonders against anything that has an effect like engine damage, or gravity drain. but ineffective against spamming units that are low on health. i have it on most of the time as i find that less ships shooting me best chances for survival. as an ship with 1 health can still deal huge amounts of damage before finally struck again. Math
~1,000 ships with 1% health = max damage or ~10 ships at full health = 1% damage
focus fire on
pros
- ships die faster thus have less time to give off another shot
- as more ships die faster you have more of an advantage over the AI than what you had before
- star ships die faster and targeted by multiple ships instead of steady few
cons
- minimized damage
- over kill
- wasted reload
focus fire off
pros
- no over kill
- maximized damage
cons
- star ships last longer
- last longer thus can kill more of your ships thus causing you maximized damage to decrease
this my experience and can vary from person to person
i find my self i have the wtf why wont u take out starship instead targeting all thoese fighters moments when i watch my fleet, thus i need to tell them target this.