I’m gonna guess this is more of a “for fun” kind of thing rather than any requirements like testing and passing certain content for a build to be approved 
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Aether Tactician. Levelled and tested: [1.1.9.1] Serving the Light
- https://www.grimtools.com/calc/qNYrWoB2 for my final Legendary setup without navigating the tabs.
- https://www.grimtools.com/calc/62aRAMXV for what i’d estimate is BiS.
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Fire pets Ritualist. Tested: [1.1.9.0] Deacons of the Deep.
- Don’t know whether you’ll want to seperate pets out like @x1x1x1x2 surmised above as they allow for different skill conversions and follow different methodologies with regards to building.
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Pierce Mage Hunter
- Tested: [1.1.8.1] Gildam Enigma.
- Untested: https://www.grimtools.com/calc/0V00mLyV
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Pierce Commando. Tested: [1.1.7.2] Antiquated Armaments
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Cold Pyromancer. Untested: https://www.grimtools.com/calc/lNk7XvBN