Would it be possible to add an option to display tank nameplates when grouped (dungeon, lfr etc.). I have friendly nameplates off but would like an indicator like a nameplate for tanks only. When I mark them in groups many don't like it and remove the mark. When grouped I like knowing where the tank(s) are.

Not possible to -truly- only show tank nameplates, but it could be a fade rule, I suppose.