What's wrong with this picture?

*Note that the Steam Tank only inflicts D3 Impact Hits rather
than D6 like other chariots (This will combine with the D3
Impact Hits per SP listed below).

Equipment
The Steam Tank is armed with a main cannon in the hull and a
steam gun in the turret. The Engineer Commander is armed
with a repeater pistol (see page 47).

Special Rules
Impact Hits (D3 per SP), Large Target, Terror, Unbreakable,
Steam Points (see page 51)

Page 51 – Steam Tank, Movement phase
Change to “Each SP allows you to move the Steam Tank 3".
To charge with a Steam Tank, first declare the charge as
normal, and then specify how many SP you are using to charge
with. The charge range of the Steam Tank is equal to 3" per SP
that is spent. In addition, each SP spent on the charge adds D3
to the number of Impact Hits inflicted by the Steam Tank in
the Close Combat phase. Note that you do not add the roll of
2D6 to the charge range when a Steam Tank charges, and that
the target unit may make a charge reaction as normal.”


Page 51 – Steam Tank, Shooting phase
Change the last sentence of the third paragraph to “Models
covered by the template are hit automatically.”

Page 51 – Steam Tank, Shooting phase
Ignore the last sentence of the fourth paragraph.

Page 79 – Steam Tank, Special Rules
Change to “Impact Hits (D3 per SP), Large Target, Terror,
Unbreakable, Steam Points”

Page 80 – Summary, Steam Tank
Change special rules to “Impact Hits (D3 per SP), Large
Target, Terror, Unbreakable, Steam Points”

No, seriously.. what is wrong with this picture? I'll tell you what's wrong with it.. a T10, 10 wound Tank with a 1+ armor save that's invulnerable to spells without a strength value.

Other than Teclis casting IF Mindrazor on Spears and praying for 6s, I see no reliable answer to this thing. In fact, most armies don't have an answer.

Before you ask:

Q. Can the spell Pit of Shades from the Lore of Shadows affect the
Steam Tank? (p51)
A. No.