Allagan Cane drops from the hardest raid so it makes sense that it's the best. It gives more mind, weapon damage, spell speed, adds piety

If you're going to focus Spell Speed, understand that it, like determination, needs to be stacked to be efficient. I'd recommend going for Allagan boots over myth for that case.

Hero's necklace should be replaced by Allagan (neither have spell speed, but the tiny bit of det will benefit you more then the tiny bit of crit)