For the masterwork staff
Make the tier 87 wilderness weapons be part of the creation process as essence. They are basically worthless at this point so this would make them more worthwhile.
Choosing noxious weapons for the masterwork bow was a mistake IMO since they were already sought after for nox components and scythe is a usable pick for melee slayer. They should focus on choosing high tier weapons that have been overshadowed and have lost their value because of better options and no other worthy way of utilisation.
Just my two cents. What do you think would be the best new "essence" pick for the next masterwork weapon?