Inarious: the two piece doesn’t do anything. It either needs a boost. Or a rework. Inarious is basically a god in diablo lore. The two piece should be something crazy. How about two piece bonus: double the effect of equipped legendary gems. Four piece seems okay now. Six piece needs to be boosted to 14k. Or a boost that would make it an alternative to LON. It has to make up for the loss of legendaries.
Trag’Oul: this set has a blood theme. This should be a blood nova set. Make iron rose and funerary pick a two piece set. Make the two piece a boost to blood nova. Or something for single target help. Inarious is already a generic boost anything set. This set needs to be specific.
Rathma: the two piece needs reworked. Perhaps two piece: all minions give essence when hitting an enemy. Give the four piece a boost. The six piece is not comparable to LON. It needs to be increased to 14k. Or something to compare with LON.
Pestilence: this needs to be a damage over time set. Basically it should be jade set for the necro. You poison enemies. Then collect something from the poisoned enemies.