[2.6] Leap slam viable?

I'm fascinated by the Leap Slam skill mechanics and how it gains both mobility and DPS with attack speed. Also, I like the idea of stomping my way through the hordes Mario-style.

I found one build for it, but it was too old for the passive skill tree to be displayable so I can't work off of it.
Other builds around here seem to use Leap Slam only for the mobility and sometimes the Fortify Support.

- Leap Slam with Faster Attacks + other supports for mobility/map clearing.
- Heavy Strike for single target.
- Herald of Ash + maybe Anger/Haste

Straightforward face-chopping.

Passives.

Pros:
- lots of attack speed, physical damage and accuracy
- 5.3% regen, leech speed, 43% all res from passives

Cons:
- fragile, only +33% life from passives. Will life leech keep up?
- few jewel spots (some close ones, reachable without too much sacrifice)
- Mana problems while not hitting things or being hit?

Gear:
Weapon: Rare Kauri Chopper w. IAS/%damage (Essence of Zeal?)
Amulet: Carnage Heart for leech/stats (Dex requirements)
Body: Bronn's Lithe
Head: Alpha's Howl for Freeze immunity
Otherwise Str/IAS/resistances.

All-out elemental conversion through passive + weapon.

Passives.

Pros:
- More +%life than other build, +58% all res.
- Vaal Pact to make better use of Berserker's Cloaked in Savagery.

Cons:
- Elemental Reflect is an issue.
- Few jewel spots.
- Less attack speed, jumping around would be less satisfying.
- Wasted life regen (disabled by Vaal Pact)

Gear:
Weapon: Ngamahu's Flame for Physical -> Fire conversion together with Avatar of Fire passive. (Elemental Proliferation support to spread the joy?)
Belt: Doryani's Invitation (fire)
Body: Bronn's Lithe
Head: Alpha's Howl for Freeze immunity
Otherwise IAS/survivability/Fire dmg/Ignition