Comments for solving the 3-sliced pentachoron
Without any macros and commutators you can do the 5 faces with 4 differently colored octahedra. Then the 5 fourcolored corners can be done with slice 3 twists only. After that you have to handle the 10 threecolored edges.
Most commutators of 2-sclice twists have only effects on the edges. With that you can place all edges.
After that the two macros of Matthiew "flip" and "turn" are very helpfull.
Here is an illustration of these macros, their references r1 to r3 and their effect.
and here is the macro file macro.