why i dont see armstrong skillguide in layality shop? where is it??

Removed.

and how do i reskill?

Buy Secret Book of Old Moon (1 day 2000 loyalties) or .... make new 56 lvl char and do ava and succ quest line.

Last quest give you 24h armstrong for whole account.

Basically this to get 2 free.

If you create a character the exact same as your main, put your main's gear on it, go to imps until ~16, Mask Owl's Forest until 38-40 then Bree Tree until 45, and Catfish until 50, head to Helms until 56, you can get 2 reset coupons in about an hour.  Because you are using a class you already did the awakening and succession quests on you get to skip the kill tasks.  Only compete the Armstrong quests when you need to reset, soon as you use the 2nd one, queue that character up for delete so you can do it again with a new version of your main.  Really you shouldn't have to reset your skills very often.

Why do you even care ? According to your own words, human beings left BDO a long time ago. Are you therefore an alien.

An alternate but very likely theory is that your statement about BDO players was just bullshit fuelled by your hate.