This wbuild wil ltake on steel path + whatever spawn ins there in SP mode I imagine at some level it wil lnot work but i never generaly get a team over 20 minutes.

I use Proboscis Cernos and Khoen prime - REaper Prime also works great

Its essentialy the same or similar build to the Inaros one https://overframe.gg/build/80630/inaros-prime/10k-health-insane-aoe-heal-inaros-helminth-build-warframe/

Rapid resiliance and adaption make you quite the tank

The real difference is the damage mitigation is baseline 82% 87.7% with [Guardian] procs and up to 44k EHP

you can also eat people

Pair this with some High performing weapons and pew pew

72% Damage mitigation on 10K vs 82% Damage mitigation on 5K

Let say you get hit for 5K damage

for [Inaros] thats 1400 damage

on Grendal its 900 damage so grendal has a lot of damage mitigation

With Guradian Proc it would be 88% for grendal only taking 600 damage not to mention adaption which would reduce this ( I think ) to what 60 damage

for [Inaros] at 84% thats 800 + adaption would be 80 damage

so overhall in theory grendal takes less damage but at some point [Inaros] would take the lead once the damage numbers increase.