So the core Dargo lines that you mentioned are still the main gist of winning with the deck and definitely ones to be familiar with but you get there a bit differently in Jund than in Mardu.
It can’t grind the mid game in the same way that Mardu can without Tymna/Lotho/esper/smithe so that’s something to be aware of. This deck requires you to either go very very quickly or be willing to kind of play dead while you wait for windows to open because you have very little protection/agency. So let’s talk about what it DOES give you.
Having access to all of the green dorks generally increases the deck’s early game consistency as well as explosivity for your win attempt turns. This deck can win on T2 very reliably if you know what to look for. It has more than a couple of “god hands” that can win on T1. And it’s basically guaranteed to push on T3 and every turn after that.
The MVP cards that I think push Jund’s raw power potential higher than other dargo options are Greater good, Tinderwall, Life’s legacy, Pattern of rebirth, Selvala, Nature’s Rhythm/the other green tutors, shifting woodlands, Spider manifestation, and birthing pod.
Razaketh lines are tutoring for wincons, but they’re also our best way of setting up protected wins by being able to tutor chain into mana, d grid/spiderpunk/dosan, breach, and beyond. A common pattern with razaketh is to sac Dargo to raz, tutor lotus petal, cast petal and crack it for Dargo, sac Dargo to razaketh, grab LED, crack it, Dargo, tutor for breach, profit. If you have excess mana going into the line you can tutor for burnt offering, spider punk, spider manifestation with haste from punk, altar and win there. You can also win with rakdos the muscle by exiling your opponent’s entire libraries with a dargo loop and either win with their wincons or force them to draw a card with Deadpool/wheel.
Nature’s rhythm is a one card wincon because it tutors technomancer and then you can cast and tap Dargo after saccing him to harmonize nature’s rhythm to grab Deadpool and win on the spot. Pattern of rebirth and Birthing pod generally are used to cheat razaketh into play, but the benefit of reyhan over Ikra is that she pods into techno lines as well as entering with counters on her for soul cauldron stuff. A really fun line if you’re on great henge is exiling tinderwall to soul cauldron and then making infinite red mana by casting Dargo, putting a counter on him from henge and drawing a card, sac him with tinderwall’s ability, net 2 red, repeat.
There’s definitely more, especially when you start talking about how to abuse shifting woodlands, but hopefully that helps. (: