I just beat Week 7 on Hard and I'm wondering what mods I should try and at what difficulty (right now I'm considering Ballistic - Easy)
Personally, I think you should go with Ballistic - Hard. Ballistic - Easy is pretty tame and doesn't provide much of a challenge; and given you beat the main game on hard, I see why you would want a more difficult challenge. Just make sure you are well prepared though, as Ballistic - Hard REALLY doesn't hold back. Hope this helps!