if you are looking purely for gear (not exp) then chest running on t6 is still by far the best way imo ( I geared m6 DH, full akkarat sader, zuni WD, firebird wiz and sunwuko monk) in the space of 1 week by chest running
View attachment 160485 <- this profile, uncheck QUESTOOLS, check use "speed buff skills" out of combat in trinity settings (whatever the are called for the class you are using
for example: steed charge)
if you are looking for exp then t6 rifts are best atm because of community buff 100%exp