You have your entire evening off during the week and nothing to do in the weekend you could do at least 10-12 Nightfalls (just make sure you don't use a character that has level 4 rep for Eris Morn) a week. Put all your guardians stuff in the vault. Re-roll a level 20 in 4-5 hours if you are familiar with the storyline, just skip all the trash (compensate underlevelling with a few strikes) Put on your high level gear of the character you re-rolled, play Nightfall rinse and repeat. This is how some of these rocket scientists on here levelled up their three level 32 characters in no time. For good measure you can squeeze in a weekly heroic and raid as well and return to the forum to complain that you have too many useless Radiant Materials and Strange Coins. PS. I wouldn't use a Titan for this if you are going to raid or you will get strange looks when you can't pop your Weapons of Light at level 30+ :p