say, it's a triple battle, trick room has been set up.
3 dunsparces. they ALL use rock slide. that means each Pokemon has a 14.4% chance of moving. under attract/confusion/paralysis, 7.2%, under 2 of them, 3.6%, under all of them, 1.8% under all of them.
is this too much setup or is this worth the 1.8% chance of moving
All the Pokemon that are viable with serene grace have max speed investment, which means they aren't intended for trick room. Therefore, there are no good trick room-serene grace combinations.