Ok, well combustion and vaporisation are 2 very different things.
If you want a big cloud hit off a vaporizer, you look at vapes like the cloud evo, volcano, the tiny might 2, ball vapes, log vapes. You can either attach or not attach any of these to a bong.
Ball vapes are top of the line for fast extraction of vapour, but you can get large cloud hits off the other style of vapes i mentioned.
But i wouldn't expect to get massive clouds off sipper vapes like a mighty, crafty, mflb, vmax, potv one, etc.
You'll likely get higher off a dry herb vape, because you can control the temperature while extracting the active compounds, instead of just buring them up into carbon like with combustion.