For ranged, anything powerful and accurate: Handgun, Crossbow, Longbow… The bots excel at sniping specials, really. For melee, there seems to be a little more variance, but should be concentrated on defensive weaponry. My group’s “tests” suggest that Kerillian does best with Two-handed Sword, though Spear might work too. Kruber and Bardin seem to generally stay alive the best with shields, likely paired with sword and axe respectively, to allow them to do some damage with it too. For Sienna… I don’t really know. The general acting of bots would probably suggest Sword or Mace. Career-wise, the sturdier ones are usually the best choice, though our tests with Kerillian are likely to continue to see if WS with two-hander can keep herself alive (as that would be more useful generally than HM).