Question about Dazzle build

I had a pub game today where someone intentionally picked dazzle (the point is, he didn't random). He said he knew what he was doing.

Get some time into the game, and he has 4 levels in poison touch, 2-3 levels in shadow wave, 1 level in weave, and 0 levels in shallow grave.

We're going up against Void, Batrider, Riki, Dark Seer, and Sand King. I die at least two times because of chronosphere while dazzle sits outside of the sphere doing nothing.

I've played dazzle a bit, and I ask him why he hasn't taken any levels in shallow grave by that point. Not one but two people on my team tell me that I "must not be a pro dazzle" (that's a quote) otherwise I would know that you don't take a level in shallow grave until everything is maxed.

I am the first to admit I'm not a pro anything, but I've always built dazzle:

• Shadow wave
• Shallow grave
• Poison touch
• max shadow wave
• alternate grave and touch
• weave when possible

In my opinion, 1 level in grave is crucial early for gank protection. Especially against void after lv 6, when it can ruin his sphere entirely. It doesn't need to be maxed until later b/c all levels are is a cooldown decrease. Poison touch should also be situational, using Shadow wave as your bread and butter spell for most of the early game. Weave is then good for ganks or teamfights.

Am I crazy?