Does not appear to work, though I bet it's the deployer not doing something right with the cells. I tried putting a tank next to the deployer and it still didn't do anything with the cells.
Looks like I can use a liquid transposer to get the lava out of the cells and into some liquiduct. With some reworking of my redstone wiring I bet I can get it to control the delivery of cells to the transposer instead of directly to the engine. It's another machine that requires MJ though, doh. Just makes things more complicated.
I suppose another option is to just get the lava strait from the squeezers instead and send it everywhere with tesseracts. I did notice that a magmatic engine put right up against a liquid tesseract can draw lava strait from it, which would kinda solve the problem all together and wouldn't require the redpower 2 delivery system.
I guess I'm killing endermen tonight.