Here's what I did:
- 200 to 260: public events. Use bungie app to find a team. Blues will drop usually above current level, purples are always +6 I believe. Save coins for 260. I saved most of my gunsmith parts as well, but I think you want to spend them here if your weapon is lowering your light.
-260: spend your vendor/faction coins and upgrade gear. You'll hopefully hit around 265 to 270.
- 265+: at this point, turn in the powerful rewards for finishing the game (if you didn't already) and finish the weekly milestones and clan rewards (join a clan!). Do the exotic weapon quests from each planet as well. For the earth one, save your blue scout rifles as you will need to break them down.
I find it's not that hard to level after 265 just working on the milestones and clan rewards is like 8 powerful engrams a week. And if you choose to level a different character later, your guns transferred over will really speed up the 200-260 time.