Also, is it just me, or is the dmg on F-orb useless in hell mode?
Say you are trying to kill lister with F-orb in hell...
Just imagine. They would charge the hell out of you in seconds.
With glacial you can at least stun them for a millisecond, cast a few blizzards (yes, you have to be very quick), then if your gear is of low quality, you can deceide to run away.
With F orb. It won't slow the last pack much at all. They will catch you easily...and within seconds, unless your gear is good...then bye bye sorc. And you will be asking your friends for help.
Remember the whole pack will take tiny damage from orb. And will not be slowed much. Then you will suffer multiple attacks.
Even if you block. Then... err.. block stun...and loads of them rush you. Glacial gives a split second time stun...
Again...think about it...