220 is very low for abs, probably why it looks so stringy, it's just not flowing that well. Mind you the pyramid things look quite good.
have you got a print area cooling fan ?
I found that it made a helluva lot of difference with all and every print.
Also printing a little quicker and hotter won't hurt.

The original t-rex skull does print without supports, but in 2 parts and at a different angle.
No one says it needs extra supports. Remember how small the teeth will be on this model, you'll not get a lot of definition, so the over hang probably won't be an issue.
Plus if you look at the printed models, the teeth are pretty blobby.