Oberon's abilities combined with the right survivability mods can make him one of the strongest non-invincible tanks in the game. We subsume an additional QoL defensive ability to further increase his survivability across all content.

Null Star is chosen because it gives you an additional 90% DR with maximum Duration. Dispensary and Quiver are also good options for builds that want to tweak their survivability towards passive playstyles.

Reckoning is replaced because it's already a nearly useless ability. Having minimum Range makes it even worse.

[Adaptation] can be replaced with [Rolling Guard] against higher level content. This build only needs [Phoenix Renewal] in max level endurance and as such other variants should be chosen instead.

Duration can be slightly lowered on builds that use abilities other than Null Star. Efficiency or QoL mods are good replacements.

Arcane [Guardian] provides a large boost in survivability. It can be replaced with any other arcane to suit your playstyle.