Well, my model just have 349,602 triangles. I think at the end it will be about max. 600,000. The very high details will be done via bumpmap-painting.
To keep the trianglecount low, i use the detail-button, and the reduzebrush.

Could you show your 700T modell please?

cheers
Masl

A8c, Blender, FlStudio, Unity3d