Just mash the buttons as correctly as you can as fast as you can.
DDO has a lot of different kinds of monsters. A lot! Apparently, creating the art for a monster is the hardest part. Or at least, the most expensive. Meaning that once we get a monster in the game, it is pretty unlikely that we will get other versions of the same monster.
In fact, modeling a new monster is so expensive that we commonly get developers copying an existing monster, making a minor tweak to its abilities, and calling it a new monster even everyone knows better. And yes, I am looking at you Vine Horror, we all know that you are just a Troll that was given an Acid Blast spell, you can stop pretending.