Bro [Equinox] is so hard to make good and satisfying for steel path. This is my test build for it.

Playstyle loop is to be in night mode, have 3 active for damage reduction (max efficiency for it to hopefully not obliterate your energy). When there's a lot of enemies, press 4 and stack up some charge on it. Once you get high (30-40k seems to be good? Depends on level) press fireball twice to strip all enemy armor, switch to day, release 4, switch back.

Thoughts: Since you aren't running 4 constantly, it might be worth running [Energy Siphon] to help against 3's energy drain since it doesn't prevent energy gain. HOPEFULLY tanky enough, but no promises. Still pretty rough. Might need vazarin school just to survive, which kinda sucks.

If equinox's 3 and 4 didn't scale negatively w/ distance, this build would be solid. But you can get pelted from long range and there's not much you can do about it.