I'm getting a ton of asterinas too but dont want to get rid of my fromia and sand sifter.. i feel your pain bro!
Plus I worry my other shrimp will not welcome one more. Good luck.
Luckily they haven't touched my zoas yet...if and when will be a different story. But i think they eating my coraline algae! I don't know except every day theres more. Thinking about getting a jeweled sea star to eat them but i need to find one first..
My red fromia and sand sifter...plus i have a coral banded and skunk that is in there...not sure how well a newcomer will do...i added a few peppermints when i saw aiptasia on a frag rock and i've seen one of them only once since...