Xmas, my suggestion is actually 1,10, 20, 30, 5. The reason for the odd order is that the 5 inversions on the end are my comfort blanket and were added on to what I already knew was probably a perfectly acceptable wash sequence. The way it works (in my mind at least) is that the first initial fill and dump will get rid of any of the residual fixer clinging to the film or tank. the 10, 20, 30 inversions work to actually wash the film and the final 5 inversions are for peace of mind.
I suspect I'm not the only one who has slightly illogical darkroom habits, which come from personal foibles.