Citi CC, simply vs Diamond vs double vs Reward vs Custom

[mustangy]

For Balance transfer and which one is best on CLI

0 apr
simply 21 Months
Diamond 21 Months
Double cash 18 Months
Rewards 15 moths 0 APR 30/60/90 days

Credit score 700+ total utilization %30
of total 70k limit
income 89k
I have citi Custom Cash  10k limit %1 utilization
No lates etc negative
HP 1 only
Which one will be best CL

[MitchDeerfield]

You can't use the Double Cash for BOTH a balance transfer and purchases because they will charge you 20-30 percent interest on the purchases.