Made it into WT4 tonight, will probably spend some time in it like I've done in WT2 & WT3; it's interesting to mess around and see the changes that happen in the world knowing certain sections of the map are war zones & others are bit more peaceful and full of allies again.
As touched on above, dedicated builds aren't really a thing yet (even though plenty of people on Reddit have come up with some creative stuff) since the devs are going to be nerfing/buffing things with each update. So I've basically just been mixing and matching whatever I like; I honestly haven't been paying really close attention to what every gear piece adds & have been prioritizing to have a mixed bag of talents that help create sort of a tank build. Armor is around 157k, health at 50k, and skill in the 500s. Trying to remember off the top of my head, I know I'm running 2 armor regens for 40% and will likely swap out one for either another Elite Damage talent to my current 2 (currently at 43% with 2 talents & a 13% attribute) or a 2nd 20% skill duration talent. I would consider dropping the skill duration talents altogether since the mod requirements to boost skills are still ridiculous, however, the devs have said they will be implementing AUX batteries you can put into 1 of the 3 slots to boost the skill power needed, so I'm planning for that. My turret/drone are offense based, so all they need is damage & health. Main talents are Unstoppable (although I've switched it up to try out Berserk before it gets changed), Patience, & Clutch. Weapons are usually always AR/LMG, which allows all 3 Spec. weapons to benefit them in some way with AR/LMG/weapon handling buffs.
It surprisingly works out pretty well on Challenging, mainly when working to revive a downed teammate while taking enemy fire and not getting obliterated as long as I'm in cover. The regen typically refills quick enough to get them up and out of the way so I can either use a medkit quickly or stay behind cover for a few seconds to get armor back. From what I've read, Berserk should benefit for me to start fighting back right away as I think armor has to be under 50% to work. If it doesn't make any difference, I always have Unstoppable talents stored on other pieces to swap back in.
I'm content with it, the main goal now is to start pushing for more weapon damage to fight off the Purple enemies. I have some attributes on other pieces I'd like to swap in, but I will wait for the update before doing so as I believe the recalibration station will not cap shared attributes anymore. The bottom line is always making sure Patience can activate though, so I'm currently at 7/7/3. I have read though, that Patience may be boosted to require 9.