Bro' .. we all on the same side .. no sheep stations at stake here.
What you are doing is a normal performance analysis for a given runway .. ie juggle about with the numbers until you get a combination of weight, flap, and overspeed which fits in with the runway and obstacle data and gives you the maximum RTOW ("optimise the RTOW" in ops engineering speak).
Almost invariably, this means an unbalanced field length takeoff.
Well done, good sir. Pass "GO" and collect $200.