First of all can't find any good system patch for windows 10 with 2618 (l2off port), auth changers mess up the patch so it becomes unusable to windows 10. Tried to use l2java.com patch since it connects to 2618 but no luck, probably they have embedded their ip into client patch so thats why it doesnt work. I solved this by changing auth port to 2106 as lin2admin suggested.
Secondly I solved my problem with authd errors by going to OBC Data sources, File DSN and reconfiguring lin2db and other databases by selecting their type from default to what belongs to them (for example lin2db to lin2db) and etc. Dunno why I needed to do this, since I've done it already by addeng them in the first place, but it works.
Now I have other problem, on vanganath files commands like //createitem or //buy doesnt work with gm access level 1, so probably it's the problem of cracked pack? Im using this http://www.maxcheaters.com/topic/154007-interlude-pack-vanganath-1236-ilext/
zemaitis's post in Cant Connect To Vanganath Server was marked as the answer