i dont think i 'd go choppin your corals just yet...
i think the best you can do is to just test all parameters,
make sure everything tests in an acceptable range,
continue to run carbon, and maybe skim a little wet,
and just let things recooperate if they can.
and your already addressing the lighting as well,
so you should be good there.
as far as adding the 2nd led unit, i would start using it about 2 weeks after you got the fist one on there,
and follow the same directions of taking a couple weeks to ramp up the intensity/move it closer.
you could also pick up some of that greenhouse light shade material to put over the tank, that might be a good option as well.
i would also think about picking up some brightwell aquatic's restor, and amino acids if you dont already dose that..