Weapons and Armor
Unless you’re in a special Crucible event such as the Iron Banner or Trials of Osiris, your weapons and armor will conform to a unified scaling system so that level gaps between low and high level players will not make PvP unfair. That being said, you still need to think about what weapons and armor you plan on equipping. If you’re favorite gun is a handcannon, you might want to equip armor that gives you more ammo for hand cannons and another piece that increases reload speed.
Also, different situations and maps require different weapons types so it’s best to keep a varied arsenal. You’ll also want to be mindful of choosing an exotic as there are many pieces that have buffs specific to PvP or PvE. Of course you’ll want to be on the lookout for those perks that are better suited to PvP play so you might want to avoid equipping anything that provides more super energy for non-guardian kills because it’s a waste of a perc in the crucible unless the other perks make it worth it.