First item for Draven

So I generally think I'm a pretty good Draven. My first main item after boots is usually BT, and I usually destroy botlane. So this one game I managed not to do so well and so all my teammates got mad at me for getting BT as first item instead of IE, to the point where this one player (who claims to be a good player but is not as good as running his mouth (his scores were horrible) ) completely thought BT was the stupidest item to rush first. Are they right? Should IE be first priority item for Draven? I personally do not think so because of the sustain that BT provides Draven. For example, if I were to be very low in HP, I could easily be back to full health in merely seconds by just throwing a few Q's. It is also consistent in damage, and scales well with Draven's skills . IE on the other hand would also provide great damage, but however, luck in critical strikes play a large role in it. So which item would be recommend to rush first after boots, IE or BT?