To my eyes it’s certainly not an impossible task, I see it being done well elsewhere and is a major pain point and imo a nr1 priority to be addressed in LE.
More about “I see it being done well elsewhere”:
I hate to mention other games over and over, hence i’ll just say that I have a proper character with 10k hp buffer if glassy up to 15 sweetspot to about 20k hp if ubertanked.
Your char doesn’t really have any natural regen, like 50hp/s if you put zero thoughts into it.
It is a generic char, not one specific class/combo that has regen specialty, any class can gear/spec to get some hp regen midly 250/s or 500/s with some speccing into it. (for instance in LE a VK right now has no dedicated VK regen anywhere in his trees and the gear mods are already fulled and i don’t think regen mods are even that worth at all and have not been balanced as well like the monster dmg)
In a game where dots and monster balance have been done well, normal mobs with dot abilities are bashing your char for like 100-250dps dots (for like 3 seconds! until you move from the ground dot if you need to), plus the mobs autoattacks ofc which are the main damage source.
That’s it white mobs deal 15dps of 10k
I haven’t seen a big boss do more than 500dps dot.
So basically your 250-500regen is countering dots efficiently, a boss can ‘shutdown’ your regen and you’re hanging at 0regen exchanging blows and countering his autoattacks with your leech and then if you’re a ranged char some kiting.
When you are facing an horde of mobs with rares/heroes in the mix is where they stack up and you can probably get 1k dps of dots on you and have to worry about it.
If you are taking 1.2k dots and do nothing you will probably die in <10seconds because the mobs will ofc add damage with their autoattacks. In ~5seconds you can still see it coming and do something about it. You can still die if: you are too squishy/not built to stand this kind of dmg and/or you were risking bit much and get bursted down by an horde.
You are now losing -500hp/s of 10-15k, some people like to run around with almost 0 regen, but if all your sustain is based on leech, you get stuck in the loop where you have to (stop and) attack to sustain.
So regen does matter, and dots are NEVER stronger than the regen that you can achieve unless you are facing an horde.
Here in LE? A pack of normal mobs in the arena will overlap ground dots that will burn down your char. You have like 500-1500hp and are receiving probably a 500dot when with such low hp numbers it should really be like 20-50/s tops.
All that is possible to do in LE is to move and move, your char has no real way to build a regen buffer or anything. In the “arena push” videos done with a melee char they move the hitbox 1m to dodge the mobs autoattacks and stop to deal one 5k hit then kite 1m again over and over, which is ridicoulous
Sorry but the monster design is so bad and in my eyes with no real thoughts behind what they spam other than some “let’s make 10 monsters and give them a big slam with some colors”.
It makes me think of one of the most controversial content in PoE, syndicate, which especially in the first iterations had the same bad numbers, hillock and i think elreon had some oneshot slams, that fire guy killed you with one dot hit, and another spammed 10kiloton knives. Really try to not emulate poe as it has some of the worst balances out there, tanks dont exist and the “succesful” builds are some absurd broken chimeras for a arpg