If the shield nerf from the last patch is reversed, then the Scathis will be a lot more bearable.
Still, seems odd that a unit that does 3.5 times the damage of a T3 arty costs about 30000 less mass. It does not have the range of a T3 arty, true, but it is also mobile and can be moved into range if need be. It also has more HP than the other T3 arty.