Yes you can put a bucket on the casting table and fill it that way to make the resonant ender for the enderium blend. But you will still need the liquid transposer to fill the frame and induction furnace to smelt the enderium and hardened glass needed for that frame.Oh. So you can't use a smeltery to assist in making tesseracts?
You essentially save some RF at expense of lava which cancels out if you use magmatics anyway. It replaces the magma crucible TBH.