Okay, so... (Destiny)

by Chappy, Arlington, VA., Thursday, April 18, 2019, 12:53 (1827 days ago) @ Claude Errera

Waiting 3 weeks means taking a ~180 drop in your Glory rank for not playing. I'd say you should play at least 3 matches per week during the revelry (spamming grenades), and you might even get some wins.
(I'm 750 away myself and still need 100 solar kills and then 150 precision HC kills)