Tweaking mastery mod question

It would be very convenient if I could just decompile .arz files, tweak few lines and pack it back up. Is the only way to do is to mess around with Archive Tool and CMD? No easier way? Also, how do I actually recompile it? Had no luck doing it with Archive Tool.

And one more thing, how do I make modded Mastery to work with the Crucible?

Many mods offer the source material so you don’t have to mess with all that. Then use the assetmanager to make your changes and build.

Yeah, well, the problem is there’s no source… I guess I’ll try to decompile it with Archive Tool to check out data, and build it anew with Asset Manager.