WAVE ONE
Fill the (Left <-- and Right --> blood pad').
by killing zombies and keep your eye on the main boss. also shoot the boss as much as you can will filling the blood pad, when the chances arrives. The blood pad will glow red and you will need to shoot all 3 blood pads at this point (Left , Center , Right). It does not matter what order you shoot each blood pad in until each one is glowing red and stops once the first wave is completed.
WAVE TWO
Fill the (Left <-- and Right --> blood pad').
When fighting wave two you will be avoiding the bosses bubble attacks that blow up over time. You will also be repeating the wave one steps.
WAVE THREE
Fill the (Left <-- and Right --> blood pad').
This wave is a little harder as the boss will pull you into him and zombies will be in bubbles shield. So you will need the hammer ability to throw to kick off shields for wave three and you will again repeat wave one steps.
WAVE FOUR
(The blood pads do not need to be charged anymore).
Once wave four hits. The boss will not summon anymore normal zombies to the map other than soul eaters at this point in the game. So all you have to do now is shoot the boss is much as you can, also the boss will only summon charged soul eater zombies into room. You will need to kill the soul eater' as quick as possible, so they don't kill you. The thulian flail teleport ability by throwing the moon orb and will be needed at this point to get over the bosses fire wave attack' than start shooting him again you will need to do this a number of times, until the first cutscene happens. Once the cutscene is over than your back in the fight but this time you only need to shoot the boss a couple more times and the second cutscene happens and the boss has been killed and you've now completed this whole map.