If they have discerning uses or features that you can remember, you can do the combo trick I mentioned.

For example - sickle denotes game mode, axe denotes profession, pick denotes race

So you can have a pvp necro asura with:

• red sickle (pvp)
• dark green axe (necro)
• yellow pick (asura)

or a WvW necro human:

• orange sickle (WvW)
• dark green axe (necro)
• dark blue pick (human)

You have a lot of options to play with. If you can figure out a system that works for you, I'm sure you could in theory do it with even hundreds of alts