I felt that Baron could be used quite well in a build where Pillar of the Caged god gets animated via chains of command, so I did a relatively quick experiment leveling up a champion to see if it would actually work. Well it does.

The character is called Raaaargrughhh (Characters of mine that use warcries are named after their sounds like pokemon) and the account is Olafant. Mind you the character is not min maxed in any way and hasnt even gotten it's final ascendancy yet nor are it's gems leveled. PoB varieties including last ascendancy points and high level gems got up to about 275k dps per minion. The current version 167k dps per minion. (regular dps, not Sirus or any boss.) I start dying in T10's once every 2 or 3 maps because survivability has received limited attention.

Easy link service:

https://pastebin.com/bv5KaqLn

https://poedb.tw/us/The_Baron

https://poedb.tw/us/Chains_of_Command

https://poedb.tw/us/Pillar_of_the_Caged_God

The Baron adds half your strength to your minions, Pillar of the Caged God deals increased phys attack damage per x strength, Chains of command animates the weapon wielded by your AG (PotCG) as an animated weapon. Animated weapons have quite some added phys damage which scales nicely with the shitload of increased phys damage.

On top of that the character wields a high single hit phys damage weapon, while shouting it's Rallying Cry so that the damage from it will added to the animated weapons and once again multiplied manifold.

Why champion? Increased aura effect and free buffed out banner, added phys damage when impaling, Causing enemies that are taunted to take more damage and be unable to evade. Were taunting with the Rallying Cry. Raaaargrughhh!

Would it be better to go cold conversion+occultist? Or even Guardian?

Any suggestions or links to similar builds for inspiration would be appreciated.