That's the just the grind. There are certain points in leveling where you'll get stuck for a while. I've been there on all 3 of my characters. You are doing what you need to do. I'd suggest also running the Vanguard strike Playlist and dailys and weeklies at the highest level you can run easily. The higher the difficulty of an activity the greater likelihood it will drop higher leveled stuff. Also crucible matches are a nice way to break up the tedium of endless strikes. Sometimes you get legendary drops in crucible. That's how I got Truth.