Sorting by the different splits and cumulative times is totaly doable via the searchable database.
Then just click the heading you want to search on (Pos, MPos, AFup, Top3up, Asc, Top3dwn, AFdwn, AFFin, Dwn, Mar)
Note the "Blanks=No" removes those without a time from the search results. The upshot is that if you sort by "Dwn" then it will automatically remove Ascent runners since of course they did not run down. If you want the blanks then do a refine search and include blanks.
The search tool is extremely powerful and for example you could do a refine search and just get the males in the 60-64 age-group which would be: