The definition given for Extended Swarm is as follows: This passive ability will extend the duration of your swarm pets by 1 second per rank. For a cost of 7 each rank to add 3 seconds to hyped-up Boo Boo seems like a waist to me. Even if one does get the 2nd and 3rd rank, isn't adding 1 second still within the "added tick" by going over the max anyway? There are so many AA's I have to catch up on, I just can't see me getting Extended Swarm any time in the next 5-10 months or so.
If I'm missing something important here, please let me know!
Zac