Sorta off base here but if you're into Thalia's Liutenant being an absolute beast you should try it in combination with
Hanweir Garrison with an aggro Boros Humans shell. Deck takes off like crazy.
As far as your problem with the sideboard I think it's pretty much where it should be, I would maybe suggest
Oath of Nissa to make Tamiyo a little more castable though - hope any of this helps