In the current meta I don't think there is such a thing as an "awesome defence team". Just too much damage from too many sources. I love defensive teams but I've given up even trying to build one at this point. My stun team is already defensive (can't do any damage when stunned) but people in the top 50 on my server beat me regularly.
I'm stockpiling Cantina, GW and Arena tokens at the moment because I can't really come up with anything to spend them on. The only thing I could come up with is to make yet another Poe/FOTP/Poggle/Sid/IG-88 monstrosity, but that means farming a bunch of chars from scratch while trying to get back to max level.
Hoping eventually they will put out some new chars in one of these sources or change the game so some different, more interesting options open up. In the meantime I am farming Finn, he seems not that great on paper but maybe I can find a use for him. I like figuring out characters that seem boring at first glance.