Defense team with Garnet?

Hi everyone. I had the immensely awesome luck to pull Garnet a week ago with one 10x summon!

Now… how can I best use her in my defense team? As tank? Full roster (of 5* heroes only) is below… what’s my best team? Thanks for the help!

Oh, here’s my current setup below.

I was also thinking maybe it might be good to run:
Seshat, Telly, Garnet, Onatel, and Vela.

Lots of mana control with that team setup but not sure if that’s better than my current def.