This build focuses on Maximizing armor as viably as possible for [Grendel] to be unkillable.
This build gives [Grendel] over 90% Damage Reduction without having to use any abilities! That comes with over 4500hp to slowly watch tick down in front of those nasty Steel Path baddies. That topped with Nourished Armor makes him a very scary Pinball. -- Combo this build with any lifesteal melee or pet and you will never need to look at your hp again.
I never personally enjoyed [Grendel]'s abilities, but that doesnt mean you can't use them. Without [Flow] or efficiency it may seem difficult, but it will only be necessary to worry when facing enemies lvl 600+.
and Yes, this build requires an Umbral Forma, but so do all great builds!
Enjoy the fat lazy frame the way he was meant to be played, by being fat and lazy. Enjoy!