A good way to farm these tokens is to buy two Cuirasses from the guild shop, equip the item on your profile and on a legion without any bonuses (like March II) and leave everything else blank, then do single hits against the Spectral Erebus raid.
Recipes
Token of Appreciation is a part of 3 recipes.
Hold mouse over crafting component to see its name and where to get it.
Hold mouse over result to see its name and type.
Click on item to jump to its page.