re: Any tips for getting certain rooms to cool better Upstairs room and TX heat!

Assuming you have tight windows, a well insulated and well ventilated attic, and well insulated walls a small minisplit is really the only answer I have.

I have this problem in South Bend, Indiana as well. two story house, top story is typically 5-7 degrees hotter than the main level. I spent probably 10k on new windows, 3k on attic and wall insulation, and another 1k on improving attic ventilation (idiots cut ridge vents in the sheathing and then shingled over the cuts before installing the vent).

All of that made just a 2-3 degree difference. Adding a small minisplit system for the three upstairs bedrooms was the only way I could get the upstairs to match the 68 degres of the downstairs on a 95 degree day.