This demo shows how we can disable triggering of slice tooltip when its legend item is hovered.
The code
legend.itemContainers.template.setup = function(item) { item.events.disableType("pointerover") };
legend.itemContainers.template.setup = function(item) { item.events.disableType("pointerover") };
The demo
See the Pen
Disabling hovers in PieChart legend by amCharts team (@amcharts)
on CodePen.0