These spectres do a bunch of melee combos with decent AoE, so melee splash is not needed. Map clearing is alright, but not as smooth as recently tested Karui Backburner for example. They look promising on paper with very high base physical dmg which im converting to chaos and the usual setup Covenant, SiS. Personally im not a fan of these spectres, something about them doesn't feel good to play.
My PoB https://pobb.in/8E8ywbzvHqrG
https://poedb.tw/us/Ravenous_Macerator#RavenousMaceratorHellscapeFleshElite2_
Get them form maps when beyond demons spawn, but be quick as corpse disappears very fast. To spawn more demons from flesh faction, take most beyond nodes, and most importantly node called ''Voracious Throng" on Atlas tree.
This was recorded on standart league.