So... it just works ?
I am having a blast or explosion with new chieftain in PoE. Very easy gearing, res caping, damage, ect - very friendly league starter on a budget. Not that youtube streamers budget where each item is divines. All you need is immortal flesh - 1c and phoenix shield - also 1c. Boots - legacy of fury is optional - not terrible not great, just icing on cake, but not needed at all. And with new ascendancies - all you care is fire res, max fire res and chaos res. Nothing else. Add purity of fire aura and some max res from tree - 90 rez ez pz. This setup is good to go to tier 16. Later - invest as much as you want for whatever you want. BUT - the kaboom meme is real, every boss with minion pack - sooooOOO much satisfaction when it blows up.
Since it excels in mass genocide with fire its very good for content like abyss, expedition, legion, breach - anything with high density, since when explosion kicks in - it clears srceens. Also sucks against single target, well not really since you still have RF + fire trap + fire debuff. And if boss will suddenly spawn a minions - Kaboom riko.