In same cases with my javazon...whenever i use CS or LF....the mana keeps going down...sometimes when i use CS,mana refills instantly...no idea why...
btw does unded monsters affect life and mana steal?

I believe you can't mana steal from undead because they have no mana, unless they are the kind of undead with mana. e.i horror mages, radament-type monters, etc. So you can't steal mana from the zombies and skeletions. I heard that mana/life leech has been nerfed in the higher difficulties is this true. If it was it might explain why my barb has a hard time killing hords of monster in hell.

I've never heard of leech being nerfed in hell and I don't think there is any reason why it should be. If it was then weapon assassins would be crap.

btw u know when u steal mana there will be some bluish thing beside ur shoulder area to inicate dat i stole mana...how comre even i attack non undead i still wont have dat bluish thing,meaning i didnt steal mana...why?=\

first of all, all monsters in the game have a % of which leach is effective. even in normal, some monsters will not allow you to leach your full amount. in nm, leach becomes less effective....and in hell, even less effective. there are some monsters in the game that allow full leach...lots of monsters in normal allow full leach actually.

as for undead, i dont know why the blue swirl doesn't show up for you. you can leach off them, its just cut way down.

the arreat summit has info on all the monsters in the game, including how effective leach is against them.

(by the way, is it leech or leach? if its leech, sorry for all the bad spelling)

I think it is leech.