I would lower your Torrent seeds as it been know to hammer most any router. do a few at a time maybe. You might want to adjust your BT settings as well. BT is a major bandwidth hog.
Streaming video over 2.4Ghz or 5Ghz?
If your doing all this and BTg, I would try to BT wired or use 2.4Ghz if your doing it over WiFi, then stream via 5Ghz if you have clients that support 5Ghz.