I usually start with Hiss Cut 0, and work upwards from there. If Hiss Cuts 2-6 mute the higher tones too much, I consider alternate hiss cut filters based of the Flescher-Munson settings. After hiss cut is done, I see if high restores are needed, and if they are able to restore or simple re-add the hiss noise.
There really are no instructions here, it's all about testing filters, hearing how they correct the audio, and remembering it. The apply them to projects.
After that's done, you can normalize if needed. And again, listen to it, to see if any noise was re-added, and whether you have to redo more anti-noise filters (apply EQ presets).
And in some cases,
SoundForge EQ can only do so much, this is why I have a whole arsenal of software, including Goldwave, Audacity and DiamondCut.