My opinion is that you need a better armor. Blood Shield is super popular, but I got another one for my Ledin that I am quite fond of: it gives him extra defense when attacked, a bit like the popular Gargoyle Jacket. Forgot its exact name.
Don’t forget you can dissolve it and get all your money and upgrade materials back when you get a better piece of gear. In the mean time, every little bit helps, especially if he is your main tank.