No matter which character you play, it pays to be unpredictable.
Sometimes you'll see Dogura do 2B>6D, like here http://www.youtube.com/watch?v=JHnlnkvE-2Y at around 13 seconds in the video. Is it air tight? Definitely not, but it works because it's not something he does repeatedly. In fact when you watch Dogura play it doesn't seem like he has an inherit pattern when he pressures people, and that's what makes Azrael scary. Also Fenrich, the Jin player, does it well himself not to do the same strings over and over again.
Why don't people just interrupt Dogura all the time in between 2B>6D? Well that's because they don't know if he's going to do that. He could've done 2B>Gustaf, 2B>2C, or even 2B>2D(if you're in range) instead since those are all airtight on normal block. So why not do 2B>Gustaf all the time? Well if you do it all the time then people can just IB the Gustaf and you'll be in disadvantage(-2). So my point being, don't be too predictable, it's nice to do airtight strings but even those have their weaknesses.
Be creative with your pressure and generally you'll be fine, and never be too predictable(something I have problems with sometimes). Be too predictable and Tager becomes a really hard opponent(those 360s and 720s hurt). Go look at Azrael's revolver action table at the end of http://www.dustloop.com/wiki/index.php?title=Azrael_Frame_Data_(BBCP) and find out what you can do after each move. Play around with jump cancelling and instant air dashing, doing your mixup way earlier in a string and even just plain up dashing through the opponent for a crossup. One thing to note though I don't think you can actually cancel 5C into 5D or 2D like the wiki says.
Also if you wanna see how "safe" each string is there's a section in the Strategy Thread over here that talks about Pressure Strings, so you can have a look at that.