I am in a unique situation and want to understand if I need to change my hotel stay strategy in 2018:

SPG - 9 years of platinum status with 880 nights. I earned my 9th year in 2018 already. I have 29 stays / 40 nights in 2018 and can easily get to 100 nights.

Marriott - 153 lifetime nights but never “earned” platinum status

If I stay at a Marriott for 100 nights in 2018 can I earn Lifetime Platinum Premier Elite because I would now have 10 years of combined elite status at the end of 2018? What happens on August 1st when they combine?

Any guidance is much appreciated

Mike
lifetime gold spg
hilton diamond
UA million miler / 1k

​​​​​​​