sit in a strike playlist as the more you play without going back to orbit the more the perk that you get allows you to get it increases your chance of getting loot.... then use a coin each time you enter a new strike ones ive found to avoid using a coin on however are the sion flayers ... note that the 3 of coins only has a chance for exotics from bosses of strikes and such like anything with the skull icon .... so strike playlists are the best