Hey Rhonna - My wife and I often watch Illuminations from Japan. We stand pretty much in front of the Tori, but back by the "sign post" (You'll know it when you get there). On the ground, not up on the balcony.
No crowds breathing down your neck, no idiots on the railing putting a 3 year old on their shoulders, and the fireworks are high enough that the Tori is not an obstruction. PLUS, you are close to the "ball" and can really see the images!
From this viewpoint, look off towards the Canadian Pavilion and you can see the Wishes fireworks too...
But please don't tell anybody about this spot, it's like, our secret ...