Here is the completed Hordes war pack (plus 2) I did for my buddy Jon. I am pretty sure that the Shredders and maybe other models don't need an arc to speak of but I don't have a book or cards to be sure. Anyway, I marked all models with an arc, easy enough to paint over.
I also added adhesive-backed felt into the Privateer Press Legion dice tin. I've done this with the other original dice sets I own... the felt deadens some of the noise of rolling into the trays.