Originally Posted by
whisperingsage
You already can have three: fishing, cooking, and first aid. So yes, you'll be able to pick up Archaeology, secondaries aren't limited.
I don't actually think we can make the Ancient Glyphs. I could be wrong, but even if we can make them, I don't think you'll be able to sell them on the AH. They'll probably be something you either trade for Archaeology stuff/ buy from the Archaeology trainer, and be BoP. Even if you can make them they'll probably be BoP. Path of the Titans is constructed very differently than Inscription is.