Used up the candy on exotics and yeah got what I wanted as far as exotics go. However, making a build takes certain stats and armor types like smoke jumpers, so it would be nice if attunement on Kepler and ghost mod dropped the armor with the stats I needed. But instead I got a bunch of shotguns, machine guns, other pieces of armor that didn't match Aion Adapter armor, I did get a renewal piece, not the chest plate I was attuning however. I was getting all tier 5 drops so I guess I shouldn't complain too much.

Making any build does not require an armor type.. that is just icing on the cake it also isn't hardest on stats. Thats the problem is people take whatever someone says and runs it as gospel. Is it nice to have 200 super and grenade sure, is it needed no the build will function and play. Stop making things worse on yourself, the self imposed grind is all on you lol.

Using the 2 piece type or 4 piece type actually does if used properly buff your damage or survivability.

Its 100% not mandatory for a build as I stated. I did all of epic desert perpetual with no set on and we cleared 155th. So no a set is not needed its nice to have but again 100% not needed.