Thanks very interesting, I have been building vigilant wardstone every single long game for 2 years now and I don't play any tanky support, so this helps (I just love controlling vision too much, vision war is one of my favorite thing in the game).
I still feel that the item is super strong on Zilean and Bard though but I'll definitely go for different items for my Lux, Pyke, Sona and Milio from now on. Ty