PoB: https://pobb.in/79dWYoquWb8o

Uber bosses are done deathless, 1 death due to I ran into Sirus Storm to test my build.
Budget: Yes, but doable in gradual term.
Most of the expensive stuffs are getting corrupted implicit (reduced crit damage, corrupted blood, +1 frenzy charge ring, etc).
The build could be even better with +1 curse replica Badge of the Brotherhood so that I can anoint +1 frenzy charge on the tree.
This build is not for starter, league start but more like a second or third character where you seek doing all challenges by yourself. It is extremely strong both offensively and defensively. High cost is fully justifiable.

For cheaper, +1 frenzy and reduce crit damage implicit is not compulsory to get the build going, but needed when you want maximum tankiness.

Recombinate the axe is easy if you aren't targeting the +1 socketed gem on the prefix. Also the cost does depend on your Veil orb's RNG whether you it stuff like Cold/ Spell damage prefixes. Costed me about 50 div to make the axe.

Edits were for typo and PoB links update.