Righ now, the official dummies got kinda outdated for our current state of mid/edgame tests on dps, they dont have any RES/MRES to test those kind of resitance pierces, and they die too fast to compute dps on endgame builds.
Some sugestions could be:
Make a special npc that let us create a customizable dummy (that let us select/change things like: size, element [and they levels], race, tag [normal/boss], aura [none/90%/99%], res, mres, def, mdef, flee, stats and health)
Make a new maps (like a level 2 area) with new rows of dummies with 500 res/mres and 99% aura with boss tag for all races and for all lvl 4 elements
Give 90% dmg reduction aura and some res (like 250) for at least all element/race/size on the special dummies area that currently already exist.