IC's attatched to small units with mixed armor tends to hurt them.
Its not the mixed armor that hurts them but the majority toughness. Especially when the toughness is lower than theirs. The mixed armor can help them as the standard is 2 drones to a suit that means on average the drones will be forced to make the saves first before the suits.
If your going to give them drones go with shield drones as they get same toughness/armor no matter what. This helps out a lot for broadside teams.