The 2 straight really is interesting. Certainly makes the 1 bank for Rex best in that case. Although I still really don't fancy it if they go all in on the bank, he'd probably not die and be in a good spot next turn. Smart to cover his 5s exit though.
I think I'm still happiest with the AS BR away and 1 bank in, wherever the TIEs go, which was my 1st thought. So that upgrade is staying with me for now