there we go.

Let's have L33tz4n and Uberbob go back up to the surface.

Remove the Chaos Grape from L33tz4n's throat, and have Shuri choke on it. (VERY VERY IMPORTANT)

Then, let's have Shuri and Uberbob go down as L33tz4n works on the laser.

SAVE THE GAME!!!

Manipulate the thirdnote into a large rope of junk.

Have Shuri grab the thirdnote rope, take the LSOD, Take a deep breath, and remove the grape. She will have a set amount of posts (I'm guessing anywhere from five to fifteen) before she runs out of air, so we need to work quickly. Have Shuri swim as fast as possible (she is the only one that can swim) on the other side of the ward, as far as the thirdnote rope will take her. If she runs out of slack, have her keep swiming to possibly drag you past the ward. If not, have her tug twice on the rope. That means she is out of slack, and is letting go. If she finds something on the other side while holding on to the thirdnote rope, three tugs. If she needs to quick get back out because she's low on air, two quick tugs and a hard pull. If she has gotten whatever we need on the other side of the ward, four tugs.

If 2 tugs, wait patiently untill you get 4 tugs or the 2-1 combo.
if three tugs, wait again untill 4 tugs or the 2-1 combo.
If the 2-1 combo is done, Pull as fast as possible and get the grape back into shuri's throat as quickly as possible.
If 4 tugs, then pull shuri back to you and give her back the grape to choke on again.