[3.1] The INVINCIBLE Sunder/Cleave Glad: Safe/Cheap (~10c), do all content, and map fast. HC Viable.

My bleed DPS for boss scenarios is 5.5k (6k if using surrender with maim support socketed in, but because most people won't have surrender so I'm calculating based off of non-maim damage) when the boss is standing still and 16.5k bleed damage when they're moving.

Crimson dance at 8 stacks will do 20k dps. On a bottom line DPS of ~110k, going from 5.5k DPS to 20k DPS is significant, you get ~15k more damage, but it comes at the cost of having to cut points from somewhere. If you don't need the resistances from diamond skin, I can see 3 points being allocated by removing diamond skin + an endurance charge, and you could probably pop 1 life node to get the 4th point, but you're comparing stand-still damage.

When the enemy is moving, crimson dance does no extra damage while the 5.5k DPS bleed turns into 16.5k. Now you're only getting ~4k more bleed damage for getting crimson dance, and with lion's roar, you can force your opponent to be 'moving' due to the knockback if you pin them against a wall. Yes, lion's roar doesn't last the entire fight, but bosses also don't stand still the entire fight.

I think crimson dance is the type of keystone that you have to build around not something you just grab because you're a gladiator that can inflict bleed, and it works much better with a low attack speed, high damage, high bleed % build because your bleeds will inflict massive damage. Because we use multistrike, our attack speed is high, but it comes at the cost of much lower hit damage and bleed damage.

Having high attacks per second does not benefit crimson dance because the max stacks are at 8. You could easily get max stacks within 2 seconds of attacking (even with 50% chance to bleed) with this build, then every hit after that doesn't matter so you're not really maximizing your build around crimson dance.

Also, because we're using BOR, you don't have the sockets to support bleed with unbound ailments or other good support gems which would give bleed insane damage.

As for getting the other bleed nodes like bloodletting and red storm, if you pulled out of some more defensive nodes like the other endurance charge, and iron reflexes, you could be able to get blood letting OR red storm, but definitely not both without making some major sacrifices which would hurt more than help the build.

The build in its current state is able to do all content with 0 problems besides shaper. Uber atziri is a very mechanically demanding fight which you need to be very good at dodging and knowing when to hide or go in for a hit.

Uber atziri is a long fight because you get very few opportunities to land hits, but I think any good player can do it without an issue.

Shaper is a problem on a different level, even with the extra DPS from crimson dance and bloodletting, I don't think you'd be able to do shaper without dying a few times. The increased bleed DPS only helps vs bosses and not the adds, which kill Zana because the direct DPS is not high enough to stop them. Max block allows us some leeway in bullet hell. I managed to survive 3 bullet hells in a row without dying because I blocked the few shots that managed to touch me, but that was luck, not skill. And I don't think having enough DPS to kill the adds is anything skill based either.

Just remember, dropping Iron Reflexes effectively causes you to lose ~2-3k armour at your bottom line which is significant, and dropping 2 endurances charges makes you lose 8% DR and 8% resists which you will feel on maps that roll ele-weakness. All of these sacrifices add up in the end to make this build much less tanky and durable for no real added benefit since you're still able to do all of the same content as before, only now you're more likely to die.

I have been trying to find a way to get the DPS higher on this build to do shaper that doesn't require huge amounts of currency i.e. GG steel rings or compromises the core framework of the build, but haven't found a working solution yet. I'll definitely update when I do since this build is still a work in progress.

I think the minimum effective DPS needed to comfortably do shaper is ~200k for this build which would allow you to kill the adds fast enough for zana to not die, at that point the fight would be more mechanical and less luck.