I loooove the Bad Juju. It is so good for regular strike grinding. You will get your super left and right before your teammates even get their first one, assuming they don't pick up your orbs you drop.

Zhalo works almost as well, seemingly, as long as you're fighting trash mobs of low-level enemies that you can string double-kills together on. I watched my super bar climb and climb as I used it. Plus, it has that arc burn going for it. They're different flavors, with different advantages. (I love my auto rifles, for one thing.)