After having looted Heroic WF Purified Bindings of Immerseus, AMR suggests me to reforge mastery rather than crit (eg, instead of spirit -> crit, it says spirit -> mastery...instead of mastery -> crit, it asks to remove that reforge)
WC spits out higher dps favoring crit, but is AMR wrong assuming mastery is better than crit because you gain 9% more from the reforge if you choose mastery rather than crit, thanks to the trinket?