Out of all the Titans I think Styxx is both the most powerful and the most difficult to use. Styxx retains Her vestigial layout from several iterations ago. When I first had cards printed out, Styxx's system diagram had three sensors, a jump jet, and a capacitor. Her three extra armour are considered sub-standard and Her deflectors impress no one now. Of course, the jump jet has been downgraded to a thrusters system, and the deflectors are a downgrade of the original shields system. Her turret no longer affords 360 degree fire upon activation, but even un-operated it expands Her systems from 90 to 270 degrees, and gives Her the ability to jump sideways. But the limbs, Styxx's arms and legs continue to be Charge 2, which is inefficient, but still fast and powerful. I think the limbs lie at the crux of the matter, as walking and changing direction are difficult for this Titan. Big arms, as well as any two cog system, feel underpowered for three cards including the Big Arm itself. Mind you, a Big Arm can cause four points of damage by punching a Titan into another Titan or into a sufficiently large building.
But that's maybe one punch for perhaps two actions on the part of another player. Could be in response to three actions by another player. You'd need a master-crew operated gun battery to do four damage, potentially eight if you had a block of buildings to push it through. Certainly I have given some thought to this.