I s'pose it could be Elem-Def-Jx4 or ST-Def-Jx4. None of them has a path, since you don't have to learn Elem-Def-J, ST-Def-J, Elem-Def-Jx2 or ST-Def-Jx2 to get them, and you don't get access to any new abilities from learning them either.

If not, I guess the capital 'I' in 'It' (on the 4th line) could matter somehow.