2. yes its aoe
4 its single target
4. erm, if you put 11 points into each int and str, you get 1 m/s or 1 h/s, this can prove useful if need be but full dex is better for dps
5. restore is useful inbetween kiting to get your health back with, also shattering scream is useful to reduce damage and reduce armour of targets (shattering scream and breka armour stacks)

thats all i know hope it helped