"Once you have all the runewords above, upgrade tir+ runes for a “tal” helm (required lvl 20)."
This is misleading, Tir+Tir = Nef, not a tal, from what I've been told, Ith+Ith = Tal, and Ith are not dropping for me, and no one is actually telling me if there is a good farming source for this ith rune.