Maybe I'm missing something but I've tried a lot of different ways to make these work. I have no problem with it on retail wow but if there is a feature to make an icon when my targeted enemy starts casting a spell to show my interrupt icon? also, how are people tracking their weapon imbues such as rogue poisons. Thanks

Use the Spell Cast and Weapon Imbue icon types. respectively.

In the future, please direct questions to the Discord - Github is for feature request and bug reports. Thanks!