I really enjoy exercising rather unusual character constructions, or taking a poor character concept and trying to make it work using min / maxing, buying points and having all levels planned from one to twenty before starting the adventure (skill increases, feats , equipment, etc.) My last project is an assistant that has the greatest potential (which means having a high level of CA in this case).
To accomplish this, my wizard would be a mountain dwarf (starting with a light and medium armor skill), and has 14 Strength. Depending on how the campaign is going, around the time I am getting close to having enough gold to buy a plate armor, I would give up an increase in the skill score in favor of the "Strongly Armored" feat (which also gives me + 1 Force, raise that skill to the score needed to wear plate armor without receiving a movement penalty.
Now, he would have an AC of 18, which is quite high for a wizard. But, as stated, my goal is that my character's AC be as high as possible. Adding a shield to my character's team would seem like a cheap way to get an extra +2 AC for an impressive total of 20. But this is where I finally approach my question.
The shields have a separate ability in 5E and using armor with which you are not competent not only imposes disadvantage in any skill check, save shot, ar attack roll involving Force or Dexterity, but also makes it impossible cast spells Not being able to cast spells would make my wizard meaningless, so for this to work, I would somehow have to gain competition with the shields.
At this point, there are two ways to obtain the domain of the shield in 5E: multiclasses of a level in a class that has domain of the shield or take the "Moderately armored" feat. Multiclassing is not really an option for me, as it would leave me unable to obtain the functions of a high-level assistant. Then he would have to take the feat just to get the shield ability. As I am already competent with medium armor, this seems to me a complete loss of feat. If that is how it is meant to work, it would not take the feat.
So my question is: Is the moderately armored feat really the only way to gain mastery of the shield without multiclasses?
Because it seems a kind of carelessness. Now, you can't reasonably expect developers to consider people like me creating stupidly specific situations like this: a heavily armored dwarf wizard who uses a shield (my character could still perform somatic components for spells even wielding) a shield already that would not wield a weapon). For the vast majority of character constructions, this would never be a problem, but I really believe that the domain of the shield should also be included in the "Strongly armored" feat.
In my other concepts of extravagant characters, I have discovered that sticking to rule books generally works well. My DM also adheres to RAW and does not use any home-made rules. Normally I totally agree with RAW, but this seems a bit silly. According to the rule book, my wizard could hold a chair in his left hand and could still cast spells, but when he holds a shield, this is no longer possible.