FIRETEAM AND COMMUNICATION
If you’re serious about dominating in PvP then you’re going to want to get yourself a fireteam equipped with microphones. While it’s not necessary, it makes winning matches significantly easier. For one, if you play Destiny with the same people frequently, you will naturally build up a flow over time and start to coordinate with one another. But also, being able to communicate with your team members is an essential capability for strategizing.
If you can’t get a fireteam together from your friends list, you might want to try joining some Destiny FB groups or scavenging the Destiny LFG websites. If that doesn’t work, or you just can’t be bothered to endure the extra time, then you should at least try switching your audio from fireteam chat to regular team chat to communicate with any of the other random players on your teams, provided they’re also on their mics looking to communicate.
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.