I’m late to the discussion, oh well. Imo there are threee levels of gear dependency. 1) is faction + random MIs farmable within several hours (usually aiming for magic affixes with the right resists to complete the build). 2) includes legendaries and everything from the first. 3) includes conduits with specific combinations of prefix+affix(+craft) and MIs with specific stats - without them the build just doesnt work
I think these are hard deviders because 1) is available to every newer player solo 2) you potentially have to trade with someone but it will be easy to trade for 3) hard to get even through trade
Most common builds will be 2) anyway so i think optional tag of (g1) - for the 1) - and (MI) - for the 3) will do the trick.