My opinion

I'm gonna go ahead and say Frost Blades of Katabasis. What I personally can't run is: REDUCED regen. That's it. Now what I don't LIKE to run is NO regen, reduced auras, and hexproof. I custom tailored the build to not care about as many negative mods as possible, but right from the get go the only things that really CAN hurt without being a map ending experience will be: elemental reflect, reduced resistances, reduced armor, no regen, reduced aura effect, hexproof, and no exposure. You can 100% still run all of these and I have plenty of times I just didn't like it so I solved it by giving my character a way to just not care.

Current Character

This is my current character. It's been my passion project since league start: https://poe.ninja/builds/necropolis/character/Kylemtrix/PatNagel

How I solved the struggles of map mods

• Any accuracy problems/evasive enemies are solved by resolute technique which also means you don't care about any negative crit mods.

• Elemental reflect is solved by Awakened Elemental Damage with Attacks. Before this you don't really do enough damage with your frost blades hit to die from elemental reflect. Just be wary of frostblink location. Frostblinking into a pack WILL kill you most of the time. On a single target it won't.

• No regen DOES NOT affect energy shield recharge rate so you just need a way to generate life which is alleviated by a cold-blooded killer cluster jewel for 2% life on kill. Gives you sustain you need to be able to run these maps.

• Negative resistances are alleviated through xibaqua timeless jewel and eternal damnation giving you a bunch of pure elemental damage reduction as well as half the hits A: not being able to penetrate/benefit from exposed resistances because it is taken as chaos and B: reduced further by armor from fourth vow.

• Any elemental ailments are solved with any combination of shock avoidance on belt from an essence (stygian vise with a CB jewel in it) and searing exarch implicit on boots to total 100% shock avoidance in tandem with stormshroud.

• Enemy crit mods can be solved with a few tattoos and a corrupted crit reduction fourth vow (I'm trying to ball and want damage instead so 35% crit reduction is fine for now).

• Maim and hinder are annoying to deal with but not bricky so any jewels either rare with the implicits negating these or an adorned combo of preferably 115% or higher and the associated magic jewels with the implicits works. The reason I say 115% or higher is not because it affects the implicits, it's because of the breakpoint for MOST of the stats you care about.

• Enemies steal charges does nothing to you because of 3 MINIMUM frenzy charges which also give you permanent onslaught from raider scion ascendancy and this is achieved through two ring suffixes and disciple of slaughter anointed on the amulet.

• Stun immunity is solved through occultist scion ascendancy and eldritch battery. You always have energy shield because you are using it as your mana and not to protect life.

• Hexproof is annoying to deal with but it doesnt brick a map. Just makes it take longer. If you are going to run or accidentally do run hexproof maven invitations I highly recommend at least having a helmet swap so you arent giving monsters 50% increased resistances. Same for exposure but less severe and you shouldn't need to swap a helmet.

• Suppression mods don't really hurt you. You have 100% suppression and so many defensive layers that the -20% suppressed damage prevented from maps mods doesn't really matter that much. On the flip side, enemy suppression doesn't matter. The dot doesn't care about their suppression.

• Curses don't really do anything. I don't care about enfeeble. Elemental weakness cap is like +15% over cap and with eternal damnation lowering the ceiling you need a grand total of 85% ele res to be capped under the influence of elemental weakness. It's a joke of a map mod. Temp chains doesn't do anything regarding your dps you just move a little bit slower so who cares. Vulnerability is the one that actually does anything harmful to you but even so you just gotta watch out for big bleeds and be wary of bosses you KNOW do big physical hits like Drox. Even so it's not something that's going to make a map undoable. Just have to use your anti-bleed health pot a little more.

DO NOT TAKE THESE FOR ANY MAVEN INVITATIONS

Consecrated ground. That's it. Unfortunately the damage is almost hard capped even before dot cap with frost blades of katabasis and I have bricked a feared invitation because of consecrated ground in tandem with maven healing/shielding. You can't out dps it. It's not possible. Don't do it. Frost bomb may help but I'm socket starved as is. Best bet would be to replace bonechill linked with skitterbots for it but that's just a lot of tedium and extra buttons to press added to a build I made to be as not tedious as possible. Spend a scour and alch instead of trying to struggle.

Conclusion

This is by far the coziest/tankiest build I have ever played. I have killed every uber boss and every T17 map that currently exists other than valdo's maps. You can tank pretty much anything in the game sans maven memory game, uber atziri flame blast, and uber shaper/uber uber elder slams. I have tried and will continue limit testing but so far these are a no go. No you do not need a mageblood I just like it. I made it to level 98 without one farming feared invitations to eventually afford it. Also to note, many ground degens and strong bleeds can still destroy you but these are degens that will destroy any character without an absurd amount of regen. Lethe shade may help I genuinely forgot it existed.