345 (remember +5)
375
390
390
405
420
For proof, my goggles compared to the 420 ones i will need alot of raiding to craft.
to point out when 8.1 came out i was right away able to craft the 375 helmet, and then the 390.
and with the raid comign out i was able to farm 15 mythic dungeons and then upgrade from 390 with 4 rings to 390 with 5 rings.
and if i go do 2 heroic bosses i can craft the 405
then once i do 10 more heroic bosses, 420 helmet!
also yes the warfront gives "400" but that is once every 3 and a half weeks...
and that is a RANDOM item, so you could get legs every rotation...