Just wondering if anyone has tried a construct army, specifically a sphinx army and whether they found it to be a viable army construction?

What I was kicking around today was this idea:

TK on warsphinx
Prince on warsphinx
Lvl 2 LP on steed
4x chariots
4x chariots
7x horse archers
warsphinx (special choice)
necrosphinx
necrosphinx

So basically, 3 warsphinxs, 2 necrosphinxs, and chariots filling out the core requirement along with some horse archers as a mobile Liche bunker. Has anyone tried a list like this? What are your thoughts?