hmmm...Can you ditch the Current and go with a complete VHO
hood? If you can you will get better lighting and more of it out of the VHO
. The lighting you have isn't really enough for several of the corals you have in your tank. Right now you are looking at about 2.1wpg, which is a bit low. For the Brain and the Torch a bit higher amount of light would help them out a lot! Also the ricorda, for the most part, is a higher light mushroom coral. I expect you have dark areas on the ends of your tank if you have the fixture centered over the tank.
If this were my tank I would look into upgrading to a complete VHO
or T5 HO
setup or possiblely going to MH
combined with VHO
....the unit you have makes it difficult to add to because of how they are made and the space they take up....
Even if you don't want to build a complete hood you could create something that could house the VHOs, though I think for what you are looking for T5s may work better!