Hit my 3000 day mark today...
I think Wado checks out some of the youtube channels like tacticalpotato but, for my part, most everything falls into build your frames to just do something ridiculous because Warframe is 95% easy,
even in Steel Path, except for the Deep Archimedia missions where you need a build for each frame that can do some sort of crowd control with minimum energy -- which isn't actually new, I mean we built that way for the community challenges and raids and the initial eidolon forays back in the day, too, because taking away your energy has always been a common hard mode decision.
Almost all weapon builds for me are exactly the same now: use the Galvanized status mods and try to get as many kinds of status onto the weapon as possible while using a riven for crit + multishot if possible.
Most of my guns look something like this now: I use the Merciless arcane instead of Serration (it takes a few kills to get the damage buff up) and I build for Viral+Heat with traditional mods while using the brand new Radiation mods to add that as well. When you hit something with 6 status mods (+ sometimes an additional two from your sentinel, usually gas+electric for me), the Galvanized status mod that functions like a Cedo* does a ton of damage. "
(*not sure if you were still around for that gun, but it gets bonus damage per type of status already applied to the enemy like Condition Overload does for melee)
You can't build everything like this but it does make even some fairly bad guns passable in Steel Path.
You can't farm all the new stuff at once but if you don't have the vitus essence in stock, I wouldn't farm it from Arbitrations without a doubler/dropchance booster/smeeta cat. So if you get a booster of some sort from log-in reward/sortie, buy the other one, get your cat, and every once and a while you'll luck out with a pack of 8 essence from a single drop. A lot of us old-timers need to do arbitrations again for Aura Forma because we're running out so maybe that can be a team thing...
We farmed the new weapon arcanes by doing Sedna Steel Path Survival for an ungodly amount of time to get acolytes every five minutes but that wasn't really necessary: if you're running all missions, in general, in steel path, you'll see enough acolytes to make it happen naturally, so while you're getting other stuff done, they'll just pop up.