Yesterday I happened to play with my N7 Fury and one of my teammates had his Drell Adept, with both characters at, or close to L20. I have to say that the game had never been this fun! :)
Those two characters are amazing together, benefiting from a fantastic synergy. Both fast and agile, packed with biotic powers triggering not only their own also each others biotic explosions. We practically destroyed collectors, as a team, and the two adepts were more often than not the saviors of the team. Even praetorians, or packs of possessed scions were relatively easy to sick given some wiggle room on the field.
Now I wonder what other characters have such good synergy. Which team compositions are as deadly, considering there are not only biotic explosion but also tech bursts, fire explosions etc etc.