Here is result from my today MH run
I can say for sure - 50 sigils / week is pretty fair price for all that fel iron.
I have suggestion to up time of Miner's Haven buff from 2h to 3h, full run take me 1h 40min w/o breaks
Also found this inside, should not be here. There also several rich adamanite nodes to road to last boss. Rich Adamanite and rich cobalt cant be mined at 60lv. Also is strange i not get any green quality raw gems from mining so many fel iron nodes ( i mean gems like blood garnet, azure moonstone, golden draenite, deep peridot, flame spessarite, shadow draenite)