You forget mention about Aspect of Tar - Shadowhorn on steroids.Horn slot has options; Brighthorn gives you 1k temp HP every minute, which is great. Melthorn stacks to -35 PRR on enemies, which is insane. Shadowhorn gives -10 PRR/MRR to enemies. Those are the main three generic choices. Debuffs are great DPS, but won't stack with a teammate bringing the same (for raids).