DDR3L support is motherboard dependent since the slots for DDR3L and DDR4 are different. Typical DDR3 is 1.5V, DDR3L is 1.35V. I would just ignore DDR3L if I were you.
DDR2400 should be fine. It will run at 2133, 2400 is the MAX speed it has been tested.
What about the voltage? Is it possible i'll have any problem for running ddr4 at 1.2v instead of 1.35v?