The way my meta plays, an Order (any Order) is placed next to a model when & where it is being declared / spent (this allows you to backtrack if you have actually expended all the Orders you've executed, or you have managed to skip one in the fray). Then again, placing an Impetous or Irregular Order next to a model generating it would be a handy way of keeping track of what and where is avaialble (esepcially once one starts spending Command tokens to "regularize" Irregular Orders), so flipping it the "spent" side up would allow for better tracking of it. IMO, you could use the same design as for the respective Order, just change the color palette - from yellow / red to gray.
The rule book say you put a marker (no Impetuous Orders anymore, so no AROs possible!... j/k, just another fuckup in the book) and remove it at some point (pages 23 and 101). But having something flipable sounds faster, as you always have it near the model, showing useful info. And fuck the brain damaged rules.
Since Assignable(W) use models that are token instead, and i saw some token lke tinbot (where some miniature exists) it would be possible to have some SymbioBomb and SymbioMate tokens?
At the time I was first designing the new tokens (pre-annex rules), I brought up some questions about these in the forum because the N4 rulebook referred to Symbiomates several times but there were actually no listed rules for them or for Symbiobombs (and at the time the Army Builder was not complete). There was also a line item in the equipment list in the N4 book for Symbiobugs but no units that had them... but since there were at least some written rules for them at the time, I added them to the tokens. I wasn't sure after the Annex came out if anyone would actually need tokens for these, but now that you've asked @Arkaon1125 I will work on creating them and passing them along to @toadchild