Well remember, the dummies have no mechanics. Just doing those will bring DPS down significantly in a real fight. The best way to maximize dps outside of your rotation and tweaking stats is the get as much uptime on the boss as possible.

For example, if during Tsuku Ex the tank pulls her to one safe spot and you run to the other side instead, you're going to lose a lot of uptime on her. So it's best to discuss tactics ahead of time in situations like that.