⥨ Disclaimer: Due to this build being originally my go-to PvE before some reworks for PvP, it doesn't have the highest crit you can be able to fully achieve with an optimal, dedicated PvP viewpoint, where Fierce might be rolled to increase crit chance or rolls that I have, for example, with Damage to Elites, can be swapped to something more useful such as a resistance to a certain status effect.
Also, I regard this build as a solo build, as I don't play in groups often. I have group alternatives to several of the build's rolls at the very bottom of this list.
[ Build Notes ]
This striker build runs at 7k firearms, 6k stamina, and 2.9k electronics so the sustain won't be comparable to that of a 9k stamina build that might be suitable for more survivability and overall better healing than a 6k stamina build. However, the 7k firearms build does give an additional boost to firearms potential and a slightly less reliance on stacks in comparison. I personally run this in Skirmish as well as the Dark Zone, but the normalisation in modes such as Skirmish and Last Stand DLC leaves it a little underwhelming in stamina. That said, I do find success in Skirmish regardless so it's worthwhile enough to use overall.
The talents somewhat go without saying, but a brief summary would be that critical save and on the move, when timed correctly, can provide a direct boost to "toughness" through damage resistance. Strike back could literally be a life saver with reduced cooldowns at low health for a burst heal of an immuniser or the boost from the pulse. As for adrenaline, while not as prominent anymore, it could stop a deadly pred bleed or a status effect such as the shock or flame turret which could be a nuisance to fight at times given that this build has no EDR.
[ Group/Mode Alternatives ]
I would personally keep the talents of on the move and critical save for the damage resistance they provide. Although, in the place of strike back or adrenaline, I might change one to Combat Medic for a group setting.
I wouldn't change anything aside from the link and pulse. In the Dark Zone, despite the lower crit values, concealed pulse might be more important for obvious reasons, although, if you're the one going rogue, recon might still be the optimal pulse. As for the link, these could be coordinated better within the group (i.e team member A and B has recovery, team member C has survivor, and team member D has tactical), but generally this build might benefit better from a survivor or recovery link. Due to the lower sustain on this build, tactical link wouldn't be as coherent with the build, especially with the consideration that this is, after all, a Striker build that provides good burst damage output with stacks and crits. However, each to their own; it all depends on the group.
I wouldn't change anything with the Lightweight M4 or the House but if there's any change that could be made, The House could also have Deadly instead of Hurried for higher crit damage.
If you want to maximise the crit damage, the backpack health roll could be changed to crit damage.