A key part to surviving in a supernatural world is gonna be items unless you're in a world where flesh has surpassed the strength of all the items and still there's gonna be a need for support items. So I'll roughly differentiate items into two categories, combat and support. Note that some items may fall on both categories.
Weapons
'The King of all weapons' the sword. Depending on what sword one uses, the reach can go from close range to mid range, not counting those ridiculously long swords. Most stories with Mc's having prior experience with swords like kendo would prefer long swords and most Mc's that are already overpowered would directly use a great sword single-handedly. Anyway, an extremely cliche weapon.
The spear. A decent weapon for complete beginners to use. This weapon is extremely common in war themed books, as the spear has a longer reach and can 'grow' with the character. The spear's most effective when used in groups such as soldiers or generals. People that usually aren't familiar with weapons would pick this, as one can pick up the basics extremely fast.
The AXE. Only for gigantic male characters or little lolis to use. Only the manliest man or the cutest little loli would use this overkill of a weapon. One may say that a heavy axe with a short handle is flawed. However, that is because it is an one handed axe. Anyway, the axe is an underrated weapon that has only been used a few times and have created a splash every single time.
Etc.
Anyway, weapons are just a small part of a characters arsenal. Another common overpowered combat item would be the BRICK. The BRICK is the single most broken item that has graced this planet. One hit and a god will fall. One tap can make it gigantic and one push can make it soar as a flying BRICK. Flexing on those lowly sword cultivators flying on their flimsy swords. Ah, sorry, abit too worked up on the BRICK. Next we have support items
Support
Item box. While not a physical item in most books, the universal most wanted item when asked before transmigration. This item would allow items to be stored in either a parallel world or be connected to some hidden place. This item box can come in many shapes and sizes, like an inventory manuel, an actual box that is summoned or just a black hole that things can be pulled out of. Optional functions consist of, auto-sorting, time stop, allowance of living things or itemising the things put in.
Transport. This could vary very much from flying swords(BRICKS) to alien ships. Depending on the situation, transport would be extremely helpful if one does not have any transport skills like teleporting or speed greater than any mode of transport.
Potions. Potions are extremely helpful whether their healing potions, strength potions, speed potions, potions to ignore pain, potions to cure poisons/curses, potions to debuff the enemy when thrown. Anyway, potion are very important as support for characters that can't heal or are out of mana/energy to heal. Potions can also help one get out of dire situations.
Etc. (yep can't remember anymore)
So items would always be an important part of any story. Thanks.