I use this stigma build most of the time bc it's the most versatile: http://aion.aspirine.su/stigma/#hCnaaavaigzaeatakaqgpfBharabf
Note that wop, no earthen call, weaken spirit/no cow is all for grp pvp. You need wop for sleep/fear dispel, earthen call is useless if you have a cleric, cow is useless if the opponent has a cleric. You play for kill during fear shriek or burst kills that's why weaken spirit is good.
If you're talking 1v1 you can remove fear shriek and bg depending on matchup and take earthen call and maybe cow instead of ws depending on the class you're fighting. Depending on your opponent's class you might have to use fear shriek or not. I fear(no ifear) against sorcs, sins, rangers, clerics, strong gunner/bard players bc if they know how to play their class you just have to fear or kite them for 1min straight after you used rs. For certain arena matchups you could argue to replace soul torrent with cow for more dps but that's very situational.
Obviously this is all pvp related. If you're doing solo pve you might want to consider Absorb Vitality and/or Armor Spirit .
The usual anti-boss-ingrp build: http://aion.aspirine.su/stigma/#hCnaaavaigBfdearakaqgpfyaodbf With that build you can swap out ws for more group oriented options like bodyguard, fear shriek or transference if you're struggling with mana. Also you could use soul torrent for more dps instead of wop if there is no phys dps in your grp. If you for some reason want to buff up 5 sins in dlr/th for example you could consider Blessing of Fire.