What Should the Steam Tank Be?

Good evening,

Well, while I'm waiting to get off my butt to actually do something constructive, construting wise, it has occured to me that I'm not quite sure what to class this Steam Tank as in HOTT terms.

The most obvious would be to call it a Behemoth, but, well, classing it as mounted would make it vulnerable to shooting which it just should not be ('cept to artillery). So, as I see it, there are four options...

1. Class it as a standard Behemoth, @ 4AP.
   


2. Class it as a Foot Behemoth - that is, as a standard Bh, but class it as foot, not mounted, @ 4 AP.
   


3. Class it as a Blade @ 2AP. Boring, but it would make it mostly invulnerable to shooting and suitably scary to foot. I think it would also suitably simulate it's lack of maneuverability and the difficulty it'd have with fast moving opponents.
   


4. Class it as a shooter, with Blade close combat factors, @ 4AP.

So, what do you think? Please vote on the side bar now!

(I also have the same problem with my EIR Tortoise...



...'cept that it can't really shoot back. What should this be?)

Nick