3.24 Necropolis PoB: https://pobb.in/ft2ZUiltqfY4
If you are up for some close-to-end-of-the-league-sorta fun build, then this may be a build for ya. This is indeed a triple DD build. Yes, its not optimized, but most of my builds rarely are. I just like coming up with something a bit different and if someone plays it, awesome. If someone takes it and makes it 10 times better, than even better!
My line of thinking for the different setups:
Main setup; DD of chain reaction in my bow, cast on crit with barrage bow skill - for every day use.
Second DD setup; level 1 rain of arrows of saturation linked to manaforged arrow support gem linked the cast on crit support gem linked to DD of scavenging. That way its not the first DD to activate because our own corpses won't work and by using our main skill barrage we trigger the rain of arrows which then casts on crit the DD. The level 1 helps its mana cost be lower and we can trigger it more frequently. Playing with the "- mana cost of skill" crafted on the rings can help trigger the RoA more frequently. (Can also just link this setup to lifetap to trigger it with every barrage attack, if the cooldown is ready that is). I like the RoA because it fires for like 3-4 seconds, and if I understand it correctly each arrow can trigger the DD. That way in between attacks or what have you it can still pop off a corpse.
Last setup; regular DD in Asenath's Mark helm where it triggers by just attacking with barrage. This one may seem like it doesn't do much, but it actually has saved me before. It is very rare - but there has been a couple times where I flame dashed into a pack of enemies (because I had to... just kidding) and I didn't crit with either my barrage or the rain of arrows, and my regular DD triggered, killing the enemies that were gonna get me.
I have ES/mana/life gained on hit which do help but are nowhere near as powerful as leech which I obtain via Doryani's Lesson. I also use Graven's Secret belt along with Divine Shield to recover ES very quickly from both physical and elemental damage.
Lastly thanks to Masterful Form Slayer ascendency node + Badge of the Brotherhood I can use Replica Restless Ward to get a lot of regeneration and because I have a decent amount of ES I took the Zealot's Oath to make it regen my ES instead of life and I can run Righteous Fire for more damage.