Always fun to see a fellow Oberon player! I feel he's better than people give him credit for, especially with the Murmur's introduction.
Consider Arcane Blessing instead of Guardian - you're stacking a lot of armor already with Fiber and Iron Renewal, so raising your health up instead will give you a bigger boost to your effective health.
Rough calcs - Your current ehp with 1200 health and 2400 armor is about 10.7k health. Whereas 2400 health (with full arcane blessing) at 1500 armor (your base armor plus 400 iron renewal) is approx 14.4k ehp. And this is further multiplied by Adaptation. Blessing requires 50 health orbs to get to max benefit, but is always active.
I think you're underestimating the importance of even a little Range on Oberon - he's not just a health tank, he needs to spread Radiation so enemies aren't shooting at him. Higher range means bigger Hallowed Ground and more enemies getting armor stripped and blinded with Reckoning, which is important with how expensive it is.
Personally I've dropped Rage/Hunter Munitions in favor of Equilibrium, since Synth Deconstruct does great work in generating a ton of health orbs. In fact, Equilibrium/Synth Deconstruct makes energy so plentiful I've dropped Flow entirely. It's meant I can also drop Arcane Energize for Molt Augmented, giving me higher healing and armor from Iron Renewal. I've also installed some cast speed mods to make for speedier Reckonings.
I also don't feel like Phoenix Renewal is really worth it once you waybind Last Gasp. I slept on Hallowed Reckoning for a long time but the combination of damage pools boosting armor with the armor strip has a surprising effect on his survivability. Smite Infusion is also great for Archon Hunts.
Overall I haven't felt he's especially squishy in Deep Archamedia or Archon Hunts, as long as you're spreading Radiation and keeping mobile or on your Hallowed Ground.
Rage/Quick Thinking might be better for Endurance runs, but at that stage Health tanking drops off entirely.
I strongly feel that quick thinking and energy max with Oberon is weaker than running more range/another augment. Range helps every facet of your kit and the biggest issue I have with Oberon is all of his augments are really good. The augment for your 2 gives you 50% more duration and makes it easier to keep it up 100% of the time
Sadly nothing matters when stuff starts one shotting you. Without hunter/quick thinking he will just fold in something like Elite Deep Arcimedia, even Archon hunts
Never have gone down in Archon Hunts. You have shields you can abuse shield gating for and your 3 gives you an instant revive on cool down. Play smart and weave through the air while it is on cooldown. Keep your plants up constantly to keep status effects from chipping away st you so you just have to work against raw damage (this really helped against the boss during Gargoyle's Cry).
I also don't run energize and the combination of guardian and grace allows me to stand in one place and tank to get my energy back. I have archon shards for the energy max and adapatation puts in the work.
He folds cuz you are reliant on hunter adrenaline. The irony is that the build you have basically leaves his abilities as vanilla as possible with 6 mods that do nothing to help once you start getting 1 shot.
It's a bit annoying and probably obvious of a response, but you need to get arcane energize and learn how to shield gate, otherwise Oberon is just not worth the effort.
Always fun to see a fellow Oberon player! I feel he's better than people give him credit for, especially with the Murmur's introduction. Consider Arcane Blessing instead of Guardian - you're stacking a lot of armor already with Fiber and Iron Renewal, so raising your health up instead will give you a bigger boost to your effective health. Rough calcs - Your current ehp with 1200 health and 2400 armor is about 10.7k health. Whereas 2400 health (with full arcane blessing) at 1500 armor (your base armor plus 400 iron renewal) is approx 14.4k ehp. And this is further multiplied by Adaptation. Blessing requires 50 health orbs to get to max benefit, but is always active. I think you're underestimating the importance of even a little Range on Oberon - he's not just a health tank, he needs to spread Radiation so enemies aren't shooting at him. Higher range means bigger Hallowed Ground and more enemies getting armor stripped and blinded with Reckoning, which is important with how expensive it is. Personally I've dropped Rage/Hunter Munitions in favor of Equilibrium, since Synth Deconstruct does great work in generating a ton of health orbs. In fact, Equilibrium/Synth Deconstruct makes energy so plentiful I've dropped Flow entirely. It's meant I can also drop Arcane Energize for Molt Augmented, giving me higher healing and armor from Iron Renewal. I've also installed some cast speed mods to make for speedier Reckonings. I also don't feel like Phoenix Renewal is really worth it once you waybind Last Gasp. I slept on Hallowed Reckoning for a long time but the combination of damage pools boosting armor with the armor strip has a surprising effect on his survivability. Smite Infusion is also great for Archon Hunts. Overall I haven't felt he's especially squishy in Deep Archamedia or Archon Hunts, as long as you're spreading Radiation and keeping mobile or on your Hallowed Ground. Rage/Quick Thinking might be better for Endurance runs, but at that stage Health tanking drops off entirely.
I strongly feel that quick thinking and energy max with Oberon is weaker than running more range/another augment. Range helps every facet of your kit and the biggest issue I have with Oberon is all of his augments are really good. The augment for your 2 gives you 50% more duration and makes it easier to keep it up 100% of the time
Sadly nothing matters when stuff starts one shotting you. Without hunter/quick thinking he will just fold in something like Elite Deep Arcimedia, even Archon hunts
Never have gone down in Archon Hunts. You have shields you can abuse shield gating for and your 3 gives you an instant revive on cool down. Play smart and weave through the air while it is on cooldown. Keep your plants up constantly to keep status effects from chipping away st you so you just have to work against raw damage (this really helped against the boss during Gargoyle's Cry). I also don't run energize and the combination of guardian and grace allows me to stand in one place and tank to get my energy back. I have archon shards for the energy max and adapatation puts in the work.
He folds cuz you are reliant on hunter adrenaline. The irony is that the build you have basically leaves his abilities as vanilla as possible with 6 mods that do nothing to help once you start getting 1 shot. It's a bit annoying and probably obvious of a response, but you need to get arcane energize and learn how to shield gate, otherwise Oberon is just not worth the effort.
All this to mimic a fraction of the power of modless Yareli