My sieg has max hurricane, and it is acceptable against mobs. In PVP, if you manage to make it inescapable it would be like a no decay DF or even better. Still, my sieg is unknown in both Stage and PVP as it was a mule before.
What I was really thinking after this patch was to replace DF or some other skill with whirlpool. It does a little more dmg than DF, cost like 3/5 of its MP and can be comboed after.
IMS is looking even better, if it does fixed damage like it was for lvl 4+, at max it's doing 2673 without STR bonus. That should be more than 70% of anyone's hp