To preface some of my favorite builds in POE and other arpgs are things like cospri malice, poet pens, things that generate alot of procs. Grim Dawn had similar things also. I see a couple builds where like hammer triggers smite or aireal attack triggers umbral blades.
Does it go any deeper with lots of procs anywhere or just a main skill triggers one other?
Tons, Paladin can proc things off Smite, Javelin, Idols, Melee, etc. Mage, or just about anyone, can proc millions of spark charges using The Enigma unique.