Why do you guys always want a nerf? I'm sure once people actually try beating it and i mean not 5x but like 50-60x and they get perfect team work they'll be able to beat him sometimes... Why does everyone always want everything easier...
Atm Arg Rumble is the only thing that requires skill and perfect cooperation to beat... And the one shotting of the roof only happends when he enrages.... THus beat him before he enrages...
Only modification they should do is give an achievement for beating him 1x/3x/5x/10x/25x this way people have incentive to try and kill it even with whipes as it will give prestige 
At endgame you run out of things to do so what do you do? You do speedruns even tho you whipe occaissionally but it doesn't matter it's fun. And Simeonus you do 1 asv every day and an rg and then you're doing nothing which means you're bored half the time. Why not start doing crazy things or things that take a while? A while ago we did 5man wbs we whiped a few x but had more fun doing that than rushing through dungeons. We've done a rumble spree with loads of whipes. No'one complained because it was fun trying to beat it.
If anything they should make bosses even more like ARG Quartenos,rumble which requires team work, Rumble is op becaus it requires focus of the entire team and timing of the entire team. Leave it as it is. And yes you should die when it crits
. Might let people consider gear switching using redemption/rightious defence combinations. And thus adding an extra dimension of skill to the game.
Liberae sunt nostrae cogitationes, Lex Talionis
If you prick us do we not bleed? If you tickle us do we not laugh? If you poison us do we not die? And if you wrong us shall we not revenge? - William shakespeare
/Glenn aka Alphadouche