Nice exercise. Note however that your 100L is "only" f/2.8, so you can do:
2x2 for 50/1.4 equivalent
3x3 for 35/1.0 equivalent
4x4 for 25/0.7 equivalent
Remember to add the overlapping "glue shots" in case you compose with a program.
Well I got a 24mm 50mm and 100mm, but I figured 24L inside may show too much distortion, my livingroom is not large.
And it's snowing outside.
Ill start with a 4 x 4 on my 50 1.4 and go from there.