I've never actually animated anything myself (well at least not in dota 2). I don't know how valve has their ward stuff set up because typically you would animate source models with .smd animation files and then later compile them (+ your model smd) with the QC file. However, I don't really know how I would do this for dota 2... sorry.

I'm sure there are some tutorials out there for animating models for wards.

I undestand, but is difficult to find to blender...