I would not increase feeding as this will only aggrevate the situation. I would not change the lighting (you want to keep things constant - lots of variances causes additional stress) but if you can make sure there is a "little" water movement, this will help wash away any additional mucus that they might make. Don't do a lot of flow as this will also aggrevate an already stressed coral.

Patience! Patience! Patience!

You can always take a bad situation and make it worse by making rash decisions (doing additional changes) which will only stress the coral out even more.

Good luck and let us know how it turns out.