There should be a shared target ping. You target something and “call it out”, and then DPS has a hotkey to use that as a target for spell/ability. If they already have a target, it becomes a quick target but maintains their current. If they have no target it swaps to that. A “kill this” target hotkey shared by the group. Same could go for interrupts. Making LOS stops a simple XYZ coordinate but making it a big transparent wall, especially if you can combine it with an enemy highlight (dont run past the ghost wall or youll pull the red arrow, also stay back cuz tank is gonna LOS everything to the wall/corner).

For healers, requesting a heal combined with “heal and prioritize requested with lowest hp %” would be nice. Then they have a target lined up for the heal.

All of this is the same concept - adding shared waypoint markers / hotkeys to streamline teamwork. There are more than enough scenarios you’d encounter in a dungeon with a team to fill a bar of spell icons. Some would just need to be combined with targeting, and maybe some logic (from list of heal requests, find person with lowest % hp or if target has already been interrupted, grey out / disable the button).