Best Mining SET - Big deal or complete stupidity?

[SEMvergonha]

Hello Pilgrims, how many of you like to invest time in the deep mines of Salem?
I believe that few have dwarf blood in their veins, and do not like to mine.

But the big question I have to ask you.
Is it worth investing in a set with the best slotted artifacts? Which ones to use? If it were to be the 7 maximum spaces, what would they be?
slotting arcane ametysti is madmess or investiment??

Anyone know how much purity would rise with 315 mining points by slotting 7 ametyst?

[ZoddAlmighty]

The higher the mining bonus is the higher purity ore you will get from mining on lower levels.
Calculate in that your M&M proff , debth and distance from the ladder you could get max rolls more often.
High purity blades sell for a hefty price but the most value you could get is by selling 70%+ whethstones. Those are really expensive.