Training Dummy please

I want to experiment with different boss killing strats, but running a whole map to test it out? What if it goes wrong and I lose the map? Now I have to find a different boss node, run the whole map, THEN get to test it out. Then what if it goes wrong?
And to add to that, what if the boss is a bad test subject? Like the skeleton in the pit?
Please give us a way to check dps strats.

I think if they were competent enough to implement training dummy, they could implement death recap already, since it is requested since POE 1 beta.

Alas...