I noticed you said:
About? 2C-E is not something to be messing with if you don't have a scale, I've been there, done that, you can get away with it sometimes without any trouble but especially with how fluffy the powder is you can easily take as much as 10mg more than you intended by accident, which with 2C-E can be the difference between a light fun trip and crying on your knees begging for it to be over.
If you aren't using a scale it's also quite likely your doses are far less than 30mg, I thought my doses were mostly in the 30-40mg range but upon actually weighing my doses for the first time I discovered they were more like 10-13mg. Huge difference. 2C-E powder looks a lot more than it is when compared to other chemicals.
Either that or I'd assume you have highly impure 2C-E, as you claim to have consumed 30mg orally, 2mg insufflated and 20mg vaporised; I've found vaporising 2C-E to be around 4-5x the potency of oral dosing, which means with those kind of amounts you should have pretty much been unable to see past so many visuals, utterly overwhelmed and out of touch with reality, and you probably wouldn't have commented on it as having been "good" in any sense.
Check out
The Big & Dandy Scale & Balance Thread if you need help finding a scale to buy. Even if you're on a low budget you can get a decent scale for as little as $15, so if you can afford 2C-E, you can afford a scale.
Tolerance does build slower with the phenethylamines but your trips will still be a million times more rewarding if spaced out. When I first got my hands on a large amount of 2C-E I began tripping several days in a row, and tripping every weekend or more frequently, I was still getting the same amount of visuals, still having strong trips, still having lots of fun - but it was only when I took a complete break for a couple of months and then tripped again that I realised what I'd been missing. :D