Lightning grenades had already been nerfed quite a bit (distance of lightning got decrease and dmg per got decrease from 170ish to 120ish. Do not see them decreasing the dmg passed this point as it still should only take 2 bolts to kill any guardian (imagine having to have someone stand in the arc for three charges to kill, how useless would that be?). SC needs no changing, really simple to shutdown a charging titan.