titan015 wrote:1. does the physical part of shuriken and singularity activate doom damage?
2. how many times does singularity hit? I assume 25/sec?
3. does tiefling form increase cast speed?
4. for caster sin which is better staff or claw?
2) Not sure but probably 25 hits per sec in center and very close to it, the further from center the less hits.
3) Nope since it's haven't FCR as buff and don't change your morph in last versions.
4) Claw is much better just because you can get much more +skills and other affixes are almost the same on 2 claws or claw+shield as if you would use staff.