Custom skills like that have to be manually coded into OldRoutine. You should be able to use the ObjectExplorer to view the skills your character has, select whatever the crab skill is, to get the id and whatnot, then logic for casting it has to be added to the routine for it to work.
Based on what the wikis says, https://pathofexile.gamepedia.com/Aspect_of_the_Crab I might be able to add in support, but i wont be able to test it myself, so ill post something for you to try later when I get a chance to look into it.
alright, the buff itself name, if it helps, is called "Crab Aspect"
And I'm assuming that is the same with the other aspects.
Internal name for the skill is called "CrabAspect"
and the id is [41729]
