How about Arachnids have a different colour rope to Grenadiers?
It would be nice to be able to tell whether you are being attacked by them or grenadiers. I sometimes feel bad when I use them because the enemy thinks I am trying for an easy victory by swarming them with grenadiers, when all I am doing is having a bit of fun.
How about renaming Arachnids to Jump Troops?
the arachnid already is different from grenadiers?