Well, you're smoking it, so it is going to be smokey! The density of the smoke is going to be relative to how quickly you burn the material. For me, I smoke Changa very slowwly, fanning the flame just above the bowl, this tends to get some vapors going before the actual combustion takes place, so it usually gets denser as the hit progresses. Burn it too quickly, and you are going to pyrolyze some of your precious dose, burn too slowly and you may not be able to get the full dose before the bong turns into some bizarre machine that you have no clue how to use!
If smoking isn't your thing, you could always try a different approach, such as a sublingual / vaporized / snorted dose of harmalas followed by vaporized freebase 5-10 mins later. Or oral dosing.