KA without a blink.
I'm not sure about an 18 month command but historically that is not unusual. It's probably now more achievable too, as the process has been the same for years. Command sim day one handling at a level expected at any other airline and day two a complex LOFT A to B, double failure, option is divert to C or D, but only one fits the failure criteria or airmanship norm's.
Gambling with your career as a map folding, bed making S/O in CX is silly when you could be learning your trade on a 320 belting around China. You'll be a competent airline pilot long before the CX guy has upgraded to F/O. You are more marketable too.
Gravitas is the CX pilot stealing a peek at your crutch in public when you're incognito without wings or braid. Bit weird for a few years but then it dawns upon you he's just checking your belt buckle to see if you work for KA or CX so as to determine social interactions and externalities. Gravitas.
