I think in game parsers would be fine given that some classes derive their own damage from someone else.
How else does a DNC know who to partner if they can't see the damage numbers...? Assuming is the only way, which isn't a great thing tbh cause you just never know. It gets worse when you have to assume between two similar DPS or two of the same DPS. (This goes with AST too, but maybe to a lesser extent. If you can't see numbers how do you know you're making the best decision?)
I mean it does encourage some sort of toxicity I guess but, wiping also does that already.
All I would see it doing is encourage people to hit higher, which is always a nice thing, there is always going to be toxic players but that is why blocking exists.
