You only need 4 kills once. Heavy ammo finders, void reserves, truth, cataclysm nova bomb, you get 4-5 rockets twice or 3 times a game. Truth is still very good, I've done malfeasance quest 5-6 times, just keep invading from the midway point with at least 3 rockets, save super for the 4th kill. It's just about finding the right team to play against. Patience is key

OP: it’s tough to get Malfeasance / Dredgen…regardless of the derision aimed at that seal from certain quarters as being amongst the easiest to obtain. It isn’t. Especially not for solo players. If I’m chasing the 4-kill or trying to complete a slayer bounty / triumphs, my weapon choices include Truth - exotic rocket, or the exotic gl with insectoid rounds - whose name eludes me! Senior moment ☺️ Be sure to have your super up, fully loaded with ammo, then go hunt. You only need to do it 1x to get the team wipe bounty done. It’s not easy…it is doable! 👈 Some invaders use arc H with the twirly stick impenetrable shield, which is very good if you’re good at that thing…I tried but it never quite worked out! Just use whatever super works best for you…and persevere… Sometimes you can get an invader slayer on your team…rare, but it does happen. That’s how I got mine done, way back. Since then, I have got a few team wipes myself, and that was a hoot. The bigger problem, though, is that your other solo or stacked teammates have their own agendas / goals / aspirations to accomplish. As someone else mentioned, try LFG or recruit some clan buddies to help…the latter being probably the best option. 🤔 Good hunting! 👈 That is all. Ease Springs! 🫡 MDGA

It's tough, you need a cheesy multi kill weapon like Truth or a decent heavy grenade launcher and your super plus plenty of luck as when you invade many players will run for cover when you really need them to group up. I only ever managed 3 kills but because I played loads of games trying, I eventually had an ally do it 3 times ... love, kudos and much appreciation to them for ending my misery! Timing is also key, once the opposing team have their primeval up there is more chance of them grouping up to melt it, but don't dive in as soon as that happens as they will first need to clear a couple of envoys.

I'm pretty sure you have to invade and defeat Guardians at an obscene level. I went in years ago with Void Titan and Truth/Colony for tracking targets. Good luck matey! Edit not sure about Private matches. I did it solo and occasionally with the clan when they could tolerate the game mode 😂