As thread title- as of now, the only ways to reduce threat on spell DPS are the Sorc/Wiz enhancement lines (40% for the whole line) and Stealth Strike on Wretched Twilight/crafted gear (15%). Do they stack multiplicatively, or additively? IIRC, melee threat increasing gear is multiplicative, so it's probably safe to assume spell threat reduction gear is the same (So 1*0.6 *0.85=0.51), but I'd like a confirmation- it would help to know for sure what % of threat my sorc is operating at.