Or maybe I'm just not noticing it...

I built a chlorolock with ele pet build to solo on my 20 mage and I've been putting synth on my pet when we're doing elites/major rifts. Lifebound Veil up. Not seeing the appropriate heals on the pet that I see on a dungeon with a standard PC tank. (Ex: Getting a big heal after a nice void spores hit; almost all the heals I'm seeing are very small, similar to what the rest of the group gets when I'm in Lifebound). Does synthesis not work correctly with pets?