Void Beacon Forbidden Jewel is better than it looks in pob for Holy Relic T17 farming

In most people's Holy Relic builds there are usually two choices of forbidden jewels:

1. Profane Bloom

2. Any necro jewel that lets you take Plaguebringer.

Profane Bloom is pretty good for specific type of farming. If you're doing 100% deli, you need the clear boost, and the same goes for Horned Scarab of Bloodlines farming.

For other farms that don't have such high monster density, Void Beacon is the best choice imo. Enemy chaos res is a common mod, and it's really annoying in t17s especially if combined with any other defensive mod. Holy Relic has very good damage, but the damage is far from infinite, you will definitely feel how tanky t17 bosses and t17 rares with extra mods get with capped chaos res. Void Beacon is a huge damage multiplier in these situations when combined with despair and lets you comfortably deal with t17 bosses. It also makes the "Maven interferes with players" and consecrate ground mods much less annoying by turning off monster regen. The radius on this isn't the full screen, but it's always up for any fight that would actually be annoying.

Unholy authority is also a very solid pair of jewels that can be worth swapping to for hexproof maps, if you're casting your own curses. AG curse on hit is inconsistent for holy relic, and this build honestly doesn't need an AG, so if you hate the build you should have +1 curse and both despair and temporal chains on hit. In these situations, hexproof in t17s is really annoying, and Unholy Authority jewels solve that problem. This is also a very cheap set of jewels.

My t17 mapping and 12 mod corrupted farms to generate t17s got a lot more comfortable with Void Beacon than with Plaguebringer. I definitely recommend swapping to it in general, if you aren't using Profane Bloom jewels, and consider swapping to it even if you do use Profane Bloom. Holy Relic doesn't scale generic damage or chaos damage, the pops don't really scale up unless you take Spiritual Command.