I was a pilot at republic. I left after 4.5 years as an FO. Pilots hired just 6 months prior to my DOH were upgraded during my 2nd year of employment. My DOH group upgraded in year 7.

I am not suggesting you should disregard obligations in your personal life just to get a seniority number. Just giving you a real life example of what 6 months can do when it comes to working at a union shop.