Hey, wanted to give a detailed account of my first day with Exerted Volcanic fissure Chieftain, here my profile since I don't have access to pob right now.

Leveling

1-12: Ground Slam - Chance to bleed - Ruthless / Intimidate - Blood and Sand - War banner: was fine a little bit on the slow side, nothing special.

12-38: Volcanic Fissure - Elemental damage with attacks - Added fire / Intimidate (for bosses) - Seismic Cry (for clear) / Herald of Purity - Herald of Ash - Blood Sand: I have seen that most people playing Volcanic fissure are having issues with the clear (lots of stragglers) but Seismic Cry with Herald of Ash Absolutely fix that issue the clear is really good.

38-57: Volcanic Fissure - Elemental damage with attack - Melee physical damage - Fist of War / Herald of Purity - Herald of Ash - Blood Sand - Seismic Cry - Intimidate: The damage is fine and the clear is good thanks to seismic (5 charges) for clear and add intimidate for bosses it's pretty comfy a little bit socket starved also you have to keep upgrading your mana flask because is demanding.

57: Volcanic Fissure - Elemental damage with attack - Melee physical damage - Fist of War - Pulverize / Herald of Purity - Herald of Ash - Blood Sand - Seismic Cry - Intimidate: Just grabbed a 5 links feels like a lot of damage.

Weapons:

Mostly find a couple of good ones on the ground and buy one around level 48 for 1c, also use the recipe.

Possible Unique's for leveling: Rigwald's Crest should give plenty of early attack damage that you need, any unique two-handed axe or mace.

Ascendancy

Ngamahu's Flame's Advance, next Valako, Storm's embrace

Pending testing (if anyone has done any of this before, please let me know how it goes)

Point blank: if the point of origin is the character or where the fissure explodes

Clarity: To fix mana problem because I don't think mana leach node or affix work with fire converted physical attacks also sacrificing 3 sockets for 3 life taps it's gonna hurt.

Not speccing in the totem node: since attack speed one (ancestral protector) is not that beneficial to me because of Fist of war - Pulverize (also to many buttons) maybe grabbing Tasalio instead and re-speccing of all the totem nodes, will see.

Conclusion

My start was kind of slow (started 3 hours late) and was constantly interrupted at home, also was testing what worked best, only at level 57 so far, it's a good build with decent clear and decent damage, requires a lot of sockets a good weapon and also is mana intensive, endgame scaling kind of worries me a little since right now I'm resolute technique, probably crit with staves or precise technique with axes (a lot of travel points but a worthy option if point blank, works in the explosion instead of you).

Edit:

POB

Edit 2:

Abandoned the build, didn't like the slammer playstyle.