Map Mods should not dissapear and citadel should be retriable like Xesht

It is so frustrating to lose map mods because some rare mob instakilled you with some bullshit without even attempting the brech/expedition/boss etc. There is already punishment for dying , you already losing items ,waystone and exp. Also even more frustrating to die in an only citadel u found for 40 hours of endgame from oneshot having 4k hp (had no dmg mods on waystone). I dont even know what to do at that point . The only upgrades that can upgrade my build is astramendis or utility belt that are both several hundred divs , also how many I need to survive oneshot ? How to restore so many hp (even maxed out flask THAT DRAINS MANA cannot heal more than half my health)? I think that GGG need to turn damage down atleast by half .