You still would have used shield if they didn’t ready and just chose to attack. M And if misty step won’t protect you from readied attacks, it won’t protect you from normal attacks. And if your minions are worthless, then you are screwed. The readied action didn’t make this less challenging, it was already not very challenging to start with. Are you expecting to go through an encounter without using a single defensive spell?
I expect a caster to not have to worry about getting disrupted every encounter by potent ranged attackers.
I recognize that since we're now steeped in hypothetical scenarios and white room theorycrafting, no one is going to change their current stance. I'll bow out of this thread for those still interested in furthering productive discussion of the original topic.