Why can't I transmute this?

I have a

- Normal (though a superior shield)
-

Tal Rune
-

Amn rune
- Perfect Red Gem

It won't transmute. Am I missing something here? Yes I want to roll the luck to add sockets.

Larzuk can add sockets though

Really? How the heck did I miss that

In that case it is good for you that you can't do it because it can roll between 1 and 4 sockets.

Larzuk is for me the way to go with a perfect

Monarch.