They're all teamworthy really.
I'd suggest reading some of the guides here and on the US boards and seeing what takes your fancy.
I love Dark Miasma but theres no shields in it. Rather it works by debuffing the foes so they can't hit you.
Its quite hard to make a bad decision really though, just pick a combo, use Search here to read up on it and if you like the sounds of it go for it. Thats what I did with my Dark Miasma/Rad on Union.
I'm going to make another defender, suggestions on what i should use i heard Dark/Dark is good, basically what i like is TEAMING like my controller is shields because i wanna be a help to team, and feel appreciated
Whats teamworthy, i might avoid empathy this time, most of all i wanna be cool