Seriously speaking..
There is no way to get that "rush" that you want. Decide what is more important for you, plugging may be a way... But it differs not that fast and effective. Be honest to yourself!
And about IV, you can trust me, i know what I am talking about - I had many good veins, everywhere ... And I was very carefull,never missing etc, nobody in my company was doing injections so correctly..... Of course there are NO VEINS for many years...though now I have some, they even may take the blood sometimes))) but I don'injecting, i want to smoke. Because I found it more easy, fast, adictable... And the worst part - the rush maybe better, depends of drug, but many of them are smokable ,...