Yes they dont fare that well. Same goes for rics and zoas. So far I noticed not many people can do rics under led. I tested with zoas. Mass melted; $800 went under.
Anyway I wont recommend upping your flow. Lps thrive on low to moderate flow. And yes like bro. Netviper said, feeding market prawns cut to the size of the mouth of your scolys help them recover. Target feeding with mysis shrimp helps too.
Lastly, what mode are you running for your vortech?