One of the means of adjusting default climb and descent speeds is via use of Cost Index. I'm not a fan of the procedure, but it has been used by my company in the past. I would prefer that they plan on a Mach number or a CI and tell me why, then let me adjust the speeds on th VNAV page for climb nad descent if necessary.
In general, if planned for a CI, accept the speeds that CI gives you for cruise. If a headwind bust makes an adjustment necessary, adjust the CI downward but remian in ECON. Remember that ECON with CI=0 is the most fuel efficient profile, INCLUDING WINDS. LRC does not give any wind correction.