Seeker of the Light. Some thoughts

Is it just back and forth movement or rotateing arounnd the character also?

Either this or it could suck in enemies in a radius, onto the impact point.

How about swaping FS to Consec. and reworking FS items for Consec synergy? Or what would be a better way to deal with the clunkyness? I think faster descending also could work for FS, and then no complete rework is neccary, or simply increasing CDR?

Absolutely, since it’s not a melee build/set it’s a caster build/set.