do i have to fully complete the collectathon tier for the detective side story cause it usually hard for me to complete any of the tiers
If you're doing the collectathon tiers, that's a total of 15 tiers. You can do 15x first tier (500 main story drops) to clear the task since each star for collectathon counts as 1 tier. You can also save ur lite boxes and open a few in one day. Opening prev hunt boxes count towards main story drops for collectathon as well.