I am playing a Cleric mainly but I took one level in Rogue as it helped me with the Expertise and Stealth. I want to know what has more potential to reduce damage for my PC. In the party I tend to have a balance of doing damage and doing some healing. My character is one PCs that tends to take quite a lot of the brunt of the fight and I want to reduce the overall damage I get.
Currently I am wearing Studded Leather and Shield, with a +4 Dex bonus = AC 18. I have been thinking of trading in my Studded Leather and using Plate Armour and a Shield instead to reduce damage. I have proficiency in Heavy Armour and Shields, so I could have an AC 20.
But, recently in a fight I was getting quite low on Hit Points and I chose to use Dodge as my main action a few times. This reduced the damage I got a lot; I got hit less times because of the disadvantage on the mobs' attack rolls.
In my situation, is Dodge more effective at reducing overall damage than having an increase of +2 to my AC from having Plate armour and a Shield?
Please provide an example of the damage reduction in your answer. Thanks for you help.