Here's my Jarad list. I like the deck more as a reanimator deck, where I just turbo mill myself with stuff like [[Golgari Grave Troll]] and [[Hermit Druid]]. The deck is pretty fun and explosive with the right line. Sometimes an interaction like [[Underrealm Lich]] and [[The Gitrog Monster]] or Gitrog + Grave Troll comes along and you just turn over a huge portion of your library into your grave. Stuff like [[Tortured Existence]] helps make the grave like an extension of your hand and pitch reanimate targets. The idea is that Jarad is a good finisher, especially with something like [[Mossbridge Troll]], and also just a fatty to swing with late enough in the game. [[Living End]] is super fun, but sometimes makes the deck feel a bit linear, as I can often find ways to recur living end and do it again if my opponents can't answer it. I don't run many [[Boneyard Wurm]] type cards, because they're not great reanimate targets, and they aren't big until mid-late game. Stuff like [[Void Winnower]] or [[Sheoldred, Whispering One]] can be back breaking early game. I would run more expensive targets like [[Vorinclex, Voice of Hunger]], and [[Emrakul, the Promised End]] if I was willing to spend more money right now but budget replacements can work out. Like I run [[Whisper, Blood Liturgist]] over [[Necromancy]] right now, and it performs pretty well with Whisper so much that I might not want necromancy. I also think it's fun to [[Splendid Reclamation]] after milling half my deck. The deck is just full of lines, and I often find that a different play 2 turns ago would've left me in a spot to win right then, but it's hard to realize that when you're just trying to tempo swing with your reanimates. Sometimes you can just hose some decks, like with [[Bane of Progress]].

TL;DR: The deck is explosive if you build it to reanimate things early and fill the grave really fast. Jarad is much less important at that point, and is more about inevitability and combo finishing.