Okay

So you've touched on the problem that is trying to keep track of your own DoTs. I feel like devs should be working on that, not by adding dot effects to weapons but actually working on the DoT UI so we don't get lost over whose dot is it.

Also, even if you're idea is implemented, without adhering to the above problem, the situation remains.

So let's fix that first. Then add more DoTs to the game.