I dont think thats how you do it lol. I think Charc said (or maybe someone else), that you need to adjust the formation of your fleet, and that it usually says ACS Attack or what not. Im not sure how to do it but Id read the wiki entry on it. Charc should know.

I suspect what you are reading has not been updated since universe 27 was opened. One thing you have to do is send you fleet out as ACS attack in instead of Attack. It is possible to do it either way.. ACS holds her attack up til you catch up or if you choose attack then both will hit target as seperate waves.

This makes a difference in how much of the res is captured. If you both hit at once then you share half of what is there. If you attack in different waves then she gets half of what is there and then you get your own half of what is left there you when you follow her in. Also depends on what ships are being sent since ground defense will be rebuilt between waves.. She hits and wins in one wave but 70 percent of the defense would recover before you followed her in.. This would really suck if you were only contributing SC or other light ships. If this was the case then you would need to hit in the same wave that she does.