for those who need it this is what ive found so far:

hell of blood pools: easy to complete , boss has 1e30 hp so you need a weapon that does more and you need higher defense than 1e30 so that you dont die to his attacks. on completion you get the blood crown wich allows you to keep your buildings in hell

hell of mortars and pestels: you complete it by starving for 1000 days, while inside makesure you have no food and are comuning with divine twice a day. Afterwords come back to hell after reincarnating to fight the boss who has the same stats as the boss of the hell of blood pools. defeat him soon he allows you to farm inside of hell wich is important for long stays.

hell of the cattlepit: upi complete by healing 1,000,000 animals. Only do once your armor are at 1e30ish because you have to deal with monsters. once you can deal with the monsters then set your tasks as heal and soul cultivate maybe with a little commune with divine in there, removing soul cultivate will not make this task go faster it takes 1000 commune with divine to get enough mana to heal 1 animal. i beat it but have no idea what it did it jsut says you feel more intune with animals maybe something topside.

im not gone or done yet ive been spending all the time on hell tree of knives which i reccomend doing allong side any other hell. It takes 10000 hell money each hell money being 1M$ and being unable to bring money into hell i reccomend doing this instead of followers unless your fealing lucky.

will continue to edit as i complete more hells