If you are having such a hard time, it is most likely due to your gear. He can be solo'd without the glitch also. You need shock weaponry that can take his armor down quickly. If you don't have any shock weaponry, it will be a long fight.
If you use the glitch to go up on the sides, you don't necessarily have to get him to jump up there with you. For me, it's actually easier if he stays down. You just have to learn how to "peek and shoot" at the right times. You don't even have to use the water valves if you do it right.