You can actually stay leveling with Forcewave till level 90 or so if that’s your jam, that’s a very strong leveling path. Either way works, and Forcewave is very good for speedleveling a soldier in general.
As for items in my build, I wouldn’t say any are required to make the build work necessarily. Gameplay will certainly be both faster/tankier with the full setup, so the more challenging content may have to wait, but there are no mechanics the build uses that are gated behind gear, if that makes sense.
You are free to make do with budget gear until you can get all the random drops and blueprints, such as in this Budget Physical Cadence S&B Warlord guide written by The_Coyote. It is for a warlord, but it gives a good idea of easy-to-get gear for Cadence which would also be suited for this build.
Hope some of that helps!