I recently got 50 SCH and I haven't run out of quests yet. There's plenty of side quests as well as the main storyline, especially for the level 45+ range, so be sure to keep an eye out for those icons on every map. Also, the most exp I got in that final week was from Low Level and Guildhest Roulettes. You can easily get 200k exp in half an hour from a single Satashta run with roulette so don't be shy about using both of them.