well Im pretty sure no one will help with this one either, but wtf I have to try...
As u know all skill animations are kept in Lineageeffect.u all scripts are described in Engine.u and there are quiet a few classes in core.u but the problem is how to appoint skill animation for certain ID, for example skill "Mental Shield" has default skill animation "wh_shield_to", but it changed in column "desc"(skillgrp.dat) to skill.wh.1036, basically it means that reappointing happens in file "skill.usk".
I f8cked my brains out figuring this out and almost finished... Last step edit skill.usk, or maybe there is another way to appoint this id, if we can figure this out - create fully custom skill animation is easy!!!