If you haven’t noticed, if specializing in Holosmith, your Elite Toolbelt skill is replaced with Photon Forge instead of providing an additional slot. It’s not exclusive to Prime Light Beam
Meaning, you can’t get the F5 skill that other elites have nor can you use them while traited as a Holosmith.
I personally an additional slot should be added, but I guess there has to be limitations. An Orbital Strike would look so nice while in Photon Forge…more so then the “purity of purpose” we’ll likely see down the line.