As a sorc with blizzard combined with the Glacial aspect as main source of damage, I can’t cast more then one Blizzard on the same spot (Boss location). As soon as I cast my second Blizzard the first one stops.
Casting one on spot, then next to it without issue, third back on original spot. Last one will make the first one disappear.
So basically this kind of ice build is screwed. I need to play frozen orb with the amulet like tons of players do. Very nice. Very creative. Extremely boring