Two T5HO lights is too much light for a standard 55 gallon tank. You could put a layer of fiberglass window screen over the light, so it reduces the intensity. That would help a lot. Two layers would probably be better.
I run a dual T5HO with a single- layer screen over my 55gal. The light is about 4" above the surface of the water. It's a low-tech, the only ferts I run are root tabs, and I run no CO2/excel/etc. Algae is fine and I get slow growth from my plants.
Amazon sword is small but puts out new leaves regularly (hard, alkaline water, so maybe they don't like my water)
Java Moss grows like nuts
Java Fern does okay, slow growth.
Chain sword is chaining.
Italian val (fairly recent addition) has sent out some runners, but so far the leaves have stayed quite short.
Nana puts out a new leaf every couple weeks.
Overall, I'd say it's about ideal for a low-tech. The growth is slow enough that about the only thing I have to trim is the java moss. I've been doing weekly 50% water changes but I'm thinking about cutting that back to see if the growth will improve with smaller changes.