It depends entirely on your game situation. If your sidelane is fine and you plan to do some sustained jungling I would suggest getting some tranquils for the regen. On the other hand, if your sidelane has a hard carry that is being harassed I would suggest rocking some arcane boots to spam battle hunger and try to chase the enemy out of the lane. If you want to roll with the old school build of maxing call second and leaving battle hunger until later, then phase boots could be considered an option for the speed burst that assures you don't whiff your call.