I am aware of the double agent trick where you can use the DA against multiple subs in a line using a faster sub.
My trick is to use your DA and get it back.
Ingredients: DA, pirate, sabo, (navigator helps if u fuck up but not needed)
If you see 2 subs, wait till it's close and send the saboteur at the first and the DA right after. ( don't wait till it's too close because fucking Ron doesn't fix sub hopping). The saboteur will be in front of the DA so send the pirate at the sabo. The sabo will turn around and bounce the DA back to you without switching sides because it has a lower target priority. Now you can just send s single sub to reclaim the DA and the sabo comes too.