I understand the idea of "hoping the clowns will go to it" but sometimes what we think will work well may not long-term. This isn't always true but sometimes a clown will take a liking to a Hammer, Frogspawn, Torch coral and inadvertently kill it. The genus of Euphyllia
(frogspawn, hammer, and torch all included) has soft and somewhat fragile flesh especially when compared to Anemone. Also to make matters worse Euphyllia
are extremely susceptible to Brown Jelly Disease (BSD) which is a very fast spreading and usually lethal bacterial infection. It is usually the result of some flesh damage of the LPS
do have soft tissue placed on top of hard, sharp, stony base they are sometimes their own worst enemy. Also a strong flow going in the wrong direction can also cause this injury to happen. Here's a good article (somewhat dated) on BJD (bacterial disease in general).
Corals - Bacterial
I lost about 80% of my Hammer in a tank from BJD which I am almost positive started because my clown took a liking to my hammer coral. I lost about 60 heads in about 3 days and was only able to salvage a small colony via aggressive dips and lots of flow to keep things flowing off of the coral.