Ample preparation was of the utmost importance before a battle. Jacker and the rest did an inspection of the equipment and brought along any other convenient tools they believed could help in their battle.
As Link possessed the dimensional pendant, he had the liberty to store more items—especially those that could be used in the case of emergencies, such as bread and water in case they got trapped.
Time stopped within the dimensional pendant. Link was thus not worried that these items would be corrupted by the Occultic Runes.
He also brought around 20 magic scrolls which he wrote during his free time. They contained Level-0 and Level-1 spells, allowing him to rapidly cast spells without consuming his Mana.
These magic scrolls indirectly increased Link's Maximum Mana, the thing limiting his battle competency. Lastly, Link also brought along a low-level Mana recovery potion.
