Custom monster issue!

[Kirbypwnage]

Okay, so I made my own custom monster, it was modeled in Sculptris, then ported to Blender. Then I rigged it, e.t.c, and everything worked fine. I even learned how to animate it, and started on an animation for when it stands still, which works like it should. But one thing I noticed when porting it into a .dae file from Blender, and then importing it into the Amnesia model editor, is that the editor would crash. I noticed that it was around 7 or 8 MB, which I know is a lot. Even when reducing the vertices down to the Servant Grunt's amount just took half a MB... I tried porting it into the model editor when removing the armature, and then it worked too.

So, the problems are these:

It crashes when I port it into the game, as long as it has an armature. I'm using the newest version of Blender, 2.6, so after what I know it should work.

Reducing the space it takes, from 7 MB to normal size. Because this is way too much...

Tell me if there is anything that needs to be more specific.


Picture of monster down here, in case that is needed. (Updated the picture to how it looks like after reduction, sorry for confusion!)

UPDATE: I now exported it into Maya, and then to model editor. Which created a new problem... Look down there to see...