I see that your sole Posting activity has been in this thread. That raises suspicion that perhaps your purposes here is to lower expectations. So you've got that going against you.
That being said, I am able or even interested in providing numbers that will get the pilot group to YES. You mention the 8% lost since July and its compounding effects on DPSP. I submit there is more to it than just numbers.
I will offer this anecdote for your consideration:
While on first year pay at DAL, I basically broke even at my Guard job. Year 2 pay at Delta is far higher for me than what my Guard gig pays. So pure financial logic would dictate that I should seek promotion to lessen the financial hit I take every time I take mil leave to stay current and useful in my role and service to
Our country. That promotion would get me about an 8% raise.

But there is more to this promotion/raise. In order to get my paperwork together, I'd have to chase down signatures from folks who are difficult to track down. My physical fitness test and OPR would have to be current within 6 months. As luck would have it, my OPR & PT cycle do not coincide. So I'd have to do them again. Long story short, I'd have to conduct a major phallic dance in order to secure promotion and an 8% raise. This is not worth my time. Maybe it would be to some, but it is not for me.

The above is not a hypothetical. I also believe that the situation correlates to the circumstances of our negotiations at DAL. So when you seek concrete numbers, consider the phallic dances or posterior pains that come along with those numbers. Sometimes they are worth it, sometimes not.

*forgive the typos. This was composed on my phone in between beers and highly competitive ping pong matches with my college buds on our kitchen pass weekend.