All I can say is MSQ cuz push the MSQ to heavensward content. If you are lv 50 I suggest you could grind poetic tomestones for ilv 120 gears just to make your journey to Heavensward easier. As for the lv 50 Duty Roulette, you can either skip it or do it for the poetic tomestones XD IMO unlocking lv 50 Roulette is good in a long run because you have extra income of poetic tomestones, exp, gils, and some of Heavenswards dungeons are remake of the lv 50 dungeons since it needs completion of those to do the lv 60 ones. Just choose a path, relax and enjoy your adventure toward 3.0 contents.