Replacing Puncture in my build

Hi everyone,

Technical question here.
Surprised by what GGG did with Puncture, I have to say I admit to be deceived.
I like the extension, reading what they added, it's really really cool and intriguing.
But my Duelist relied on Puncture for boss killing with Crimson Dance as main keystone.
Now that it's a box gem, I haven't the possibility to transfigure it for now, so I would like to ask you guys, Duelist specialists : what you would advice me to replace Puncture with ?

I don't know if it is possible to link a character, and if so how to do it, but you may be able to see my character in my profile. Just tell me if it isn't visible I'll link the tree and stuff for you to take a look at.

I have a good collection of gems in my chests and Lily is here to get me sorted if I lack some, but I would like to hear about what would be your suggestions for a bleeding build as a main click attack for boss.

Build explained to help you :
It's an hybrid build, relying on dualwield (Vaal) Double Strike and Cleave for mass trash killing, Bladestorm for 360° "protection" linked to LGoH and LL supports for mass life regen when possible.
The second config is the boss one, and that's the one with Puncture for mass bleed damage, shield for blocking half of the time, and running around if needed with Whirling Blades.
I can take small bosses with the mass trash config, but the big heavy boss at the end of each act will be generally hitting too hard for this config. That's why I would like to keep the shield config with a huge attack that allow me to inflict massive amount of damage on single target and be protected at the same time.

For now at level 54 I haven't had any real problems apart from Piety and High Templar Avarius due to their Diablo-like "spinning big ray of death" attacks that are faster and faster until the last strike OS my character.

I welcome all ideas, and thanks to all of you for reading and maybe answering my question.
Have a good day everyone.