id suggest looking into a bushing downstem. this will bring the height down a little as it sits nearly flush with the GonG joint. this is probably the simplest and least expensive option. if this is too simple and you want to go nuts, sell your A/C and invest in an inline A/C. that way you are most likely getting better diffusion without taking up vertical space, but using space in front of your tube.
HTH
Get one of those plug in lighters like Phedor or modify a soldering iron. There are 100's of threads about these topics on here.
Personally I like using a glass stick that I heat up with a torch.
Perhaps smoking your bong with the damned bowl turned 90 degrees to the left or the right