I'm sure once season paragon rolls over, a few folks here will shoot right past 600.
Yep this is me haha. As of right this second once the season ends my non-season paragon level will be 613. Will only go up from here obviously. I'm at the billion xp mark per level which should be every ~4 levels giving me a level non-season.
Fire COTA with TnT and Immortal King 4 piece do a ton of damage.
Sadly you have to give up so much to run with that. But yeah, it is quite a bit of damage. Even without TnT fire ancients can basically solo T6 as you sit afk.
I think the biggest problem with IK right now is that we don't really have the tools to make a proper pet build which is what a setup like that really needs. We aren't a natural pet class like WD so even if you run IK you aren't really using abilities that make your pets better, you are using abilities that make your character do more damage. Your pets are just sort of there.
It annoys me because the solution is so fucking obvious. Just remove the cap on the seasonal barb weapon (or make it something way higher) and suddenly you have a reason to run IK + TnT. Using the rune that makes ancients give you fury each time they hit combined with TnT gives you more fury per second than you can spend which would allow you to spam HoTA which would give you a steady stream of pets that would benefit from having TnT. I'm not saying the build would be a GR 40+ build, but, it would still be pretty solid and make that not a waste of a weapon on the loot table.