Not counting UYGF... 2 seems to be the most you can rack up in 6 months before you start getting denials.
Here is a simple technique I used two years ago ... applyed for 7 CCs at the same time. I mean, in about 5 minutes. Got 3 of them with a total LOC of $31,000 ... So, 7 inquiries vs $31,000 ... good enough for six months ...