If my math is correct, I'll end the year with just over 123,000 mqm.

I am currently DM, and PM as of now for next year.

Should I do a mileage run for the last 2k miles? Or just rollover the miles?

Unless I'm missing something, if i roll over the miles I potentially get a much better deal out of it?

Scenario 1:
Mileage run. Barely hit DM for 2016 and have to then get 125,000 MQM again in 2016 to requalify

Scenario 2:
Rollover 48k. Start 2016 off as plat. Put everything on my plat Amex and try to hit the 25k spend threshold asap (which gives me mqd waiver and 10k bonus mqm). As soon as I get 77k miles in 2016 (which I estimate will take me around 8months based on my current travel patterns), I get the remainder of 2016 with DM, and get all of 2017 with DM. Plus get a head start on DM for 2018. Downside here is fewer regular miles for flights I do fly (PM multiplier), and i have to stick it out as PM for part of 2016...

Decisions, decisions.... Any advice? Anything I'm missing?