Knucks is a violence-prone ganger but he's not a psycho. He's on uppers right now, so he's a bit more rabid than usual, but he hasn't lost common sense. (He's still Logic 3, even on downers.) As convenient as grenades would be, he's wary of making a big scene. Plus he's in debt and doesn't want to waste money on explosives when fists and feet will do.
And Knucks is Prejudiced, but he is only Biased. I may be RPing him closer to Outspoken, but in his heart he doesn't want to kill all humans. (Alternatively, he doesn't want to kill all humans.) He just likes showing them who is boss.
(Answer: Knucks. Knucks is the boss.)
He doesn't know the town well and will be concerned about potential heat if things get too noisy or messy. He'll advocate for punching WizKid in the face if he can get close enough while invisible; if not, he'll suggest throwing a knife into WizKid's throat. It's not the (literal) shock and awe of a lightning ball, which he is not opposed to. Knucks would prefer not to be electrocuted, so he might have to give up his idea of descending into the center of the Technoids as a whirling dervish of melee madness.
OOCly, a good lightning ball will probably incapacitate a lot of Technoids without necessarily geeking them. If the Technoids throw us a curveball and come downhill in vehicles instead of on foot, we might have to lightning ball the vehicles and then have Knucks and Expo close in for the finishing touches. It won't be too hard to rein in Knucks in terms of him going overboard, but he wants to break a sweat. Especially on uppers, melee will be that much more satisfying to him than shotguns.