I'm not quite sure, does Crystal Meth, when smoked, which is lab tested and confirmed to be high quality and 99% pure (of different sources the only Meth I was able to find that actually was not Crank, so there indeed is a lot of very poor quality Meth not only in Europe, but also in the USA, tho good quality I was not able to find in Europe at all...) tends to have effects lasting shorter then when Meth is snorted, because except for my first time, I can also easily smoke several grams in two hours time... And not feel way too stimulated at all, just immensely euphoric, but really over the top euphoric, only Coke of highest quality gives a more intense euphoria and only the combo called Snowball or as they say in Europe Fireball gives a more intense rush (if done with both drugs, both the H and the C being highest quality, that is), but on the other hand, it's actually that the way in which the euphoria is one of pure euphoria and feeling totally natural, like the euphoria of Coke, that makes it just way more pleasant to experience, while in fact when it comes to pure intensity, then maybe Meth when done so excessive is most intense, but you tend to use way more of Meth because it's euphoria does not feel natural but highly chemical and synthetic and not as pleasant as the euphoria you get from Coke, so you use way more Meth trying to get over that unnatural feeling by using so much that you hope to overcome this unnatural euphoria by getting so euphoric that the synthetic/chemical nature of the euphoria will get lost in the intense feelings you experience.
But for me, even with Meth, the euphoria is way more intense than the stimulating qualities are, I never feel too stimulated as when I mix Meth with Coke or sometimes just from only using Coke (from which also the euphoria is always way higher than the stimulating qualities).
Now, unless, something I do not know but probably is the case, Meth when smoked is way shorter acting then other ROA's (except for shooting it up or plugging it in that case I would guess) then no, two grams, once you did Meth at least once, is not too much for me at all... But I should most definitely mention that I have this unpleasant thing that I have by nature a huge tolerance and immune system, as I always need two or three times the amount of a drug to not feel half the intensity of effects someone, or anyone else, is feeling and this costs me a lot more drug-wise but is probably the only reason why I'm still alive...