Vit Cabalist is great, get Dark one set.
Check out nery’s melee builds here he has some budget options ⚔ Nery's beginner build collection
I have some melee builds in my collection too but they much more gear to be able to farm gladiator crucible
You can farm challenger cruci and Elite SR like 55-65 with mid-tier builds, pretty good loot per time there too.
Could you link to your Cabalist btw? Perhaps we can help you improve it with just minor changes.
Even if you get krieg set, it is not a “miracle cure”, you need many more items for it to shine.