How many sim matches would I have to do per day to hit 72 wins this season? Or alternatively, how many days are in a season and I can do the simple division myself. 
Three will do it if you play every day of the season. A few days of 4 are easy enough to make up the difference if you miss one here or there.
just a reminder. The season rank table has a timer that tells you how many days left in the season. and technically you need 74 wins to unlock the rogue cover.
All of that is visible on the main screen
Four wins per day. #simples
Ah yes, I didn’t even think to look. It didn’t occur to me that the season would have a timer like any other event. 74 wins for rogue isn’t visible from the main screen if you want to be technical. 
So 20 more days, 64 wins to go. 3-4 wins per day indeed. Thanks all!