Nothing requires you to complete Lairshaper before beginning Crystalshaper, that was kind of the idea behind it. Getting Crystalshaper to 100 might actually help you level Lairshaper faster because you'd get XP for making the Crystals (you don't currently because it isn't a primary skill for Lairshaper).
That said, you have lots of products you can make as a Crystalshaper. And, you get 10 Crystalshaping per level as a Crystalshaper, only 8 per level as a Lairshaper.