The more the merrier
Perk card sharing guide
Info status: Obsoleted | Jan. 5, 2020, 3:36 p.m.
Its assumed in this article that you know the foundations of perk card sharing in Fallout 76.
Here you'll instead learn how to maximise your output as a team with practical examples.
So if you're after building a team that mathematically outperforms its competition, it's necessary to arrange it well. The first step is to notice how much charisma each of your teammates have - without considering Magnetic Personality perk.
If this is something like 3, 3, 4, 3 - then yeah, you'll need Magnetic Personality shared in the team that's for sure. If it is 3, 8, 9 and 20, you might skip sharing it, instead, only apply it on the player with lowest charisma, so that they'd get to 9. The other players might gain some charisma if they don't have the herd mentality mutation or the strange in numbers perk. The goal is to get everybody at least to 9 and to do so with minimised cost.
Take look at what your team is actually composed of, and find the common theme, or create one.
For example, if everyone in your team uses either rifles, pistols or shotguns, then all of you would benefit from VATS perk cards. Share Better Criticals, Four Leaf Clover and Critical Savvy - those perks that are all useful, but you sometimes swap them depending on the situation - now you can have them all. If you don't share Magnetic Personality, pick something from paragraph below.
If there's no damage perk synergies between your builds, share something that will benefit all, and let people specialize on their own having critical part of their build provided externally - share Lifegiver (if you got somebody that had high enough endurance to put it in), Fireproof, Bloody Mess and optionally Sneak if you don't share Magnetic Personality.
Alternatively, if you're after some good old scavenging for junk and legendaries, you might want to decluster yourself, and have a nice set of weight reduction perks applied cross team: Pack rat, Traveling Pharmacy, Strong Back and optionally True Hiker will turn your super optimised powerbuilds into powerfood builds :D
If you're after something exotic, maybe you'll be interested in the path of the revenant: a gamble that will mostly give you nothing, but when it will give you something it will be spectacular.
Share Revenant, Mysterious Saviour and Injector Perks. Each time you're downed and revived, you come out as ridiculously powerful killing machine. There's a chance of auto-revival with mysterious stranger that will trigger the revenant perk and put you in temporary super-saiyan mode. Be advised that if you're downed in the open, Mysterious Saviour won't help you as you'll be killed anyway with following bullets. This is for those cases that they've barely got you just as you've been hiding.