If you do make this make sure you keep the Skitarii at Strength/Toughness 3- they're not that heavily augmented and they're certainly no where near Astartes in strength or fortitude.
May I suggest a Punisher Cannon, possibly twin-linked, in place of the Vulcan Mega Bolter? The Mega Bolter seems more suited to a Walker that's vastly larger or a tank that isn't intended to be relatively graceful and speedy, whereas the Punisher is much smaller but still has the furious fire rate that you might be looking for.
May I suggest a Punisher Cannon, possibly twin-linked, in place of the Vulcan Mega Bolter? The Mega Bolter seems more suited to a Walker that's vastly larger or a tank that isn't intended to be relatively graceful and speedy, whereas the Punisher is much smaller but still has the furious fire rate that you might be looking for.
