1. Right now I have Exp and Equi frozen and only TU unfroze. Should I open one or both for CA application on this?
2. Also, if I do the Citi AA 2BM should I also do a 3BM for another company (Chase or even another Citi card just not AA) to maximize on the inquiry?
You keep asking these questions again and again, just read the forums and the answers are all there.
1. Citi will only pull from the bureau they pull from in your state, i.e. if they try EX and it's frozen they won't accept EQ or TU, they will insist you unfreeze EX. Check which bureaus Citi has pulled for you in the past, or if you don't have a Citi pull see what's typical for CA.
2. 2BM/3BM only works for one issuer, so you'll still get multiple pulls (one from each issuer) if you apply to multiples at the same time, The only thing you gain by doing multiple issuers on the same day is that they typically don't see eachother's pulls, so you can apply for more credit in a short period of time that way.