I understand that's difficult at first but ultimately isn't it a similar adaptation as with traffic lights? You just kinda memorize which shield type each one has and adjust accordingly. Void: Minotaurs Shielded psions Fire: Wizards Shielded Shanks Centurion Arc: Captains Shielded knights Shielded harpies I'm missing a few I'm sure. But even without being colorblind I've just been memorizing shield types because 90% of the time I'm sniping from too far away to see it anyways.