Hidden Blade of Kitava's thirst build?

This build was spitted out only for testing purposes. Otherwise, it would cost about 90 regret orb to redo.... might do it, but it is not complete.

Hidden Blade is a free projectile attack, which mean we can CoC BB of DD

Add in Archmage and about 822 unreserved mana to reach a triggered spell cost of 101 mana

All the is needed to trigger Kitava's thirst with 2 extra BB of DD, with trigger bot, you get 6 triggered spell every 0.5 second. Can't trigger faster then that be of some questionnable descision of making the 0.5 delay of Unseen Strike NOT a cooldown.

Regardless, mana sustain is the big bottleneck (About 1/10th of the Templar's neck)

Unseen strike being an attack, we can use Mana leech support and Mana leech in tree. It works partially, which makes me think it could be fix, but I can't find a good solution.

Reaching 100% accuracy and Crit isn't a problem, neither is clearing. Simply get piercing projectile and watch as 1 projectile can trigger and clear an entire group.

Survivability is also a problem, but since we get 100% phasing uptime and have Purity minion, ennemies rarely targets the character. It is still a problem I'm trying to solve, But I believe if Mana sustain is fixed, we can also fix that issue.

Any nice people wanting to help me make it work?